{"product_id":"fish-zithro","title":"Fish Zithro (Fix Zithro) 250mg 12\/30ct","description":"\u003cstyle\u003e\n  .fph-product-copy {\n    --fph-text: #1f2937;\n    --fph-heading: #111827;\n    --fph-border: #d9dde6;\n    --fph-surface: #f8fafc;\n    --fph-surface-alt: #f3f5f8;\n    --fph-accent: #143583;\n    --fph-danger: #c62828;\n    --fph-warning: #f59e0b;\n    --fph-radius: 18px;\n    color: var(--fph-text);\n    font-size: clamp(15px, 1.05vw, 17px);\n    line-height: 1.75;\n    overflow-wrap: break-word;\n  }\n\n  @media (prefers-reduced-motion: no-preference) {\n    html:has(.fph-product-copy) {\n      scroll-behavior: smooth;\n    }\n  }\n\n  .fph-product-copy,\n  .fph-product-copy * {\n    box-sizing: border-box;\n  }\n\n  .fph-product-copy .fph-section \u003e * + *,\n  .fph-product-copy .fph-panel \u003e * + * {\n    margin-top: clamp(14px, 2vw, 20px);\n  }\n\n  .fph-product-copy h2 {\n    margin: 0;\n    color: var(--fph-heading);\n    font-size: clamp(23px, 2.6vw, 33px);\n 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class=\"fph-toc-label\"\u003eOn this page:\u003c\/span\u003e \u003ca href=\"#overview\"\u003eOverview\u003c\/a\u003e \u003ca href=\"#bird-zithro-vs-fix-zithro\"\u003eBird Zithro vs Fix Zithro\u003c\/a\u003e \u003ca href=\"#benefits\"\u003eBenefits\u003c\/a\u003e \u003ca href=\"#dosage\"\u003eUsage\u003c\/a\u003e \u003ca href=\"#mechanism\"\u003eHow It Works\u003c\/a\u003e \u003ca href=\"#side-effects\"\u003eSafety\u003c\/a\u003e \u003ca href=\"#shipping\"\u003eShipping\u003c\/a\u003e \u003ca href=\"#faq\"\u003eFAQ\u003c\/a\u003e\u003c\/nav\u003e\n\u003ctable class=\"fph-spec-table\"\u003e\n\u003ccaption\u003eFix Zithro at a Glance\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFor\u003c\/th\u003e\n\u003ctd\u003eOrnamental aquarium fish \u0026amp; non-food pet birds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHelps with\u003c\/th\u003e\n\u003ctd\u003eFin and tail rot, columnaris, gill disease, early respiratory signs in birds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eForm\u003c\/th\u003e\n\u003ctd\u003eTablets, 250 mg each (crushable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCount sizes\u003c\/th\u003e\n\u003ctd\u003e12 count, 30 count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMade in\u003c\/th\u003e\n\u003ctd\u003eUnited States by Aqua Soma Labs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFix Zithro\u003c\/strong\u003e supplies \u003cstrong\u003e250 mg azithromycin\u003c\/strong\u003e per tablet and is an antibacterial treatment for ornamental aquarium fish and non-food pet birds. It is often chosen to help manage suspected bacterial problems such as fin and tail rot, columnaris, gill disease and early respiratory signs in pet birds.\u003c\/p\u003e\n\u003cp\u003eOften called Bird Zithro or Fish Zithro in the hobby community, Fix Zithro is a reliable replacement for the discontinued Thomas Labs Bird Zithro, Fish Zithro and Aqua Zithro 250 mg products.\u003c\/p\u003e\n\u003cp\u003eThis azithromycin tablet from the Aqua Soma Labs Fix range is used for common problems such as fin and tail rot, columnaris, gill disease, bacterial hemorrhagic septicemia and other bacterial infections in freshwater and saltwater aquariums. Bird keepers also use it, under veterinary guidance, for mild upper respiratory tract infections (URI), suspected Mycoplasma issues, or conditions like chlamydia psittaci (psittacosis \/ parrot fever) in pigeons and other pet birds.\u003c\/p\u003e\n\u003cp\u003eAzithromycin works to help slow or stop the growth of certain bacteria in the gills, skin and respiratory tract. Used as directed in fish or birds, it works best alongside good husbandry, clean water and appropriate nutrition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFix Zithro\u003c\/strong\u003e from Aqua Soma Labs is available to buy online in bottles of \u003cstrong\u003e12 or 30 tablets\u003c\/strong\u003e with fresh expiration dates. This gives hobbyists flexible options, whether they maintain a single hospital tank, multiple community aquariums, or need flock treatment and loft management for a busy aviary.\u003c\/p\u003e\n\u003cp\u003eUse Fix Zithro when you notice early signs of bacterial stress. The warning signs differ between fish and birds, so the lists below split them by species.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eFish-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eClamped or frayed fins (fin and tail rot)\u003c\/li\u003e\n\u003cli\u003eRed or cloudy patches on the body\u003c\/li\u003e\n\u003cli\u003eFuzzy patches that suggest columnaris\u003c\/li\u003e\n\u003cli\u003ePop-eye (exophthalmia)\u003c\/li\u003e\n\u003cli\u003eGill irritation or labored gill movement\u003c\/li\u003e\n\u003cli\u003eSecondary infections around gill flukes\u003c\/li\u003e\n\u003cli\u003eListlessness or a persistent loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eBird-Specific Symptoms\u003c\/h3\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eSneezing and nasal discharge\u003c\/li\u003e\n\u003cli\u003eUpper respiratory tract infections (URI)\u003c\/li\u003e\n\u003cli\u003eSwollen eyes or sinus infections\u003c\/li\u003e\n\u003cli\u003eSuspected Mycoplasma issues\u003c\/li\u003e\n\u003cli\u003eSigns linked to chlamydia psittaci (parrot fever)\u003c\/li\u003e\n\u003cli\u003eRuffled feathers, fluffed-up posture\u003c\/li\u003e\n\u003cli\u003eReduced activity or loss of appetite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eTreat bacterial issues early, keep the water clean, and ask an aquatic or avian professional when one is available. That combination gives your fish and birds the best chance to recover and keeps the aquarium or aviary stable.\u003c\/p\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003eOrder online\u003c\/strong\u003e for same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Fix Zithro ships directly from our U.S. warehouse via USPS or UPS.\u003c\/p\u003e\n\u003cp class=\"fph-alert\"\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e This product is \u003cstrong\u003eintended for aquarium and ornamental fish and pet birds only\u003c\/strong\u003e. It is \u003cstrong\u003enot for animals used for food\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== BIRD ZITHRO vs FIX ZITHRO ========== --\u003e\n\u003csection id=\"bird-zithro-vs-fix-zithro\" class=\"fph-section\"\u003e\n\u003ch2\u003eBird Zithro vs Fix Zithro: What Changed?\u003c\/h2\u003e\n\u003cp\u003eIf you previously purchased Thomas Labs Bird Zithro, Fish Zithro or Aqua Zithro, here is what has changed and what remains the same:\u003c\/p\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Azithromycin, Same Strength\u003c\/strong\u003e Fix Zithro contains the same \u003cstrong\u003e250 mg azithromycin\u003c\/strong\u003e per tablet that you relied on with Bird Zithro and Aqua Zithro. The same formula targets the same bacteria.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eNew Manufacturer\u003c\/strong\u003e Fix Zithro is made by \u003cstrong\u003eAqua Soma Labs\u003c\/strong\u003e, replacing the discontinued Thomas Labs line. Aqua Soma Labs manufactures in the United States under strict quality-control standards.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eSame Tablet Form\u003c\/strong\u003e Fix Zithro uses the same crushable \u003cstrong\u003etablet\u003c\/strong\u003e format as the original Bird Zithro, making it easy to dissolve in aquarium water or mix with soft food for birds.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eAvailable in 12-Count and 30-Count Bottles\u003c\/strong\u003e Choose the size that fits your setup: a 12-count bottle for a single hospital tank or occasional use, or a 30-count bottle for larger collections, multi-tank operations or aviary flock management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== BENEFITS ========== --\u003e\n\u003csection id=\"benefits\" class=\"fph-section\"\u003e\n\u003ch2\u003eBenefits of Fix Zithro for Fish \u0026amp; Birds\u003c\/h2\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eBacterial Support for Fish \u0026amp; Birds\u003c\/h3\u003e\n\u003cp\u003eFix Zithro provides azithromycin coverage for ornamental fish and non-food pet birds. It helps manage common problems such as fin and tail rot, columnaris, gill disease, and early respiratory signs or the ornithosis complex in birds when used as directed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eReady to Use Promptly\u003c\/h3\u003e\n\u003cp\u003eKeep Fix Zithro on hand so you can begin treatment as soon as you notice early signs of bacterial stress. For pet birds, professional veterinary guidance is still strongly recommended to set the correct amount and duration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eHelps With Internal and External Infections\u003c\/h3\u003e\n\u003cp\u003eAzithromycin in Fix Zithro can be used for skin lesions, ulcers, fin damage and internal infections in a hospital tank, as well as part of a treatment plan for mild respiratory or Mycoplasma-related concerns in pet birds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eConsistent 250 mg Tablets\u003c\/h3\u003e\n\u003cp\u003eEach tablet delivers a consistent \u003cstrong\u003e250 mg\u003c\/strong\u003e of azithromycin, making it easier to scale treatment from a single betta or quarantine tank up to larger community aquariums, lofts or aviaries without complicated calculations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eEasy to Administer\u003c\/h3\u003e\n\u003cp\u003eThese crushable tablets are easy to mix and can be dissolved directly in aquarium water or mixed with soft food, providing flexible options for shy, stressed or hard-to-handle fish and birds while minimizing handling and extra stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eVersatile for Freshwater, Saltwater \u0026amp; Aviary Setups\u003c\/h3\u003e\n\u003cp\u003eHobbyists reach for Fix Zithro as their trusted choice in both freshwater and marine systems, and as a convenient option for pigeons and other ornamental birds kept in lofts, cages or aviaries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eIdeal for Hospital Tanks and Quarantine\u003c\/h3\u003e\n\u003cp\u003eUsing Fix Zithro in a separate hospital tank or treatment cage helps protect the main aquarium's biofilter and reduces unnecessary exposure of healthy tank mates or flock members while you focus treatment where it is needed most.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== USAGE ========== --\u003e\n\u003csection id=\"dosage\" class=\"fph-section\"\u003e\n\u003ch2\u003eUsage Guidelines \u0026amp; Instructions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDirections for Use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col class=\"fph-step-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eSet Up a Separate Treatment Area\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a dedicated hospital tank and, where practical, house birds needing treatment in a small treatment cage. This helps protect healthy tank mates or flock members and lets you control dosing more precisely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDirections for Fish Aquariums\u003c\/h3\u003e\n\u003cp\u003eDissolve \u003cstrong\u003eone 250 mg tablet per 10 gallons (38 L)\u003c\/strong\u003e of water in the hospital tank. Mix the tablet in a small cup of aquarium water first, then distribute it evenly around the tank. Repeat the dose every 24 hours for \u003cstrong\u003e5 to 7 days\u003c\/strong\u003e while closely monitoring water quality and fish behavior. This is the standard amount for fish unless your aquatic veterinarian advises otherwise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eUse in Pet Birds (Under Veterinary Guidance)\u003c\/h3\u003e\n\u003cp\u003eOnly administer Fix Zithro to pigeons and other pet birds under the direction of an avian veterinarian. Your vet can advise you on the correct amount for the bird's weight, frequency and duration. Tablets may be given whole, split, or crushed and mixed into soft food or drinking water exactly as instructed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eMaintain Water Quality \u0026amp; Finish the Treatment\u003c\/h3\u003e\n\u003cp\u003ePerform partial water changes as needed between doses to keep ammonia and nitrite low and ensure good aeration in the hospital tank. Continue treatment for the full recommended number of days even if fish or birds appear better; stopping early can allow symptoms to return. If there is no improvement after several days, or if signs worsen, consult an aquatic or avian professional.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable class=\"fph-dose-table\"\u003e\n\u003ccaption\u003eFix Zithro Amounts by Aquarium Size\u003c\/caption\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTank volume\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eAzithromycin per use\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e250 mg tablets\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 gallons (38 L)\u003c\/td\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 gallons (76 L)\u003c\/td\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 gallons (114 L)\u003c\/td\u003e\n\u003ctd\u003e750 mg\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 gallons (151 L)\u003c\/td\u003e\n\u003ctd\u003e1000 mg\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e55 gallons (208 L)\u003c\/td\u003e\n\u003ctd\u003eabout 1375 mg\u003c\/td\u003e\n\u003ctd\u003e5 to 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese numbers follow the label guideline of one 250 mg tablet per 10 gallons, about 25 mg per gallon. Dose by the water volume of your treatment tank, not by the number of fish, give one dose every 24 hours for 5 to 7 days, and round to the nearest practical tablet. Split a tablet for tanks under 10 gallons. The bottle label or your aquatic veterinarian takes priority over this quick-reference chart.\u003c\/p\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eAmounts for Pet Birds\u003c\/h3\u003e\n\u003cp\u003eBirds are given an amount based on body weight, not by water volume, so there is no single chart the way there is for aquariums. The right amount depends on the species, the bird's weight and the specific infection. An avian veterinarian sets the amount, how often to give it, and how long to continue. Crush and mix the tablet into soft food or drinking water exactly as your vet directs, and do not estimate avian amounts on your own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat to Expect During Treatment\u003c\/h3\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 1 to 2\u003c\/h3\u003e\n\u003cp\u003eFish may hide or eat less, and the water can look slightly cloudy. That is normal at the start. Keep dosing on schedule and keep aeration strong.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 3 to 5\u003c\/h3\u003e\n\u003cp\u003eWatch for signs it is working: fin damage and red patches stop spreading, appetite returns, and breathing steadies. If nothing changes by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eDays 5 to 7\u003c\/h3\u003e\n\u003cp\u003eEven once the fish improve, finish the full treatment so the infection does not return. Afterward, run a partial water change and put activated carbon back in to clear any leftover azithromycin from the water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fph-info-card\"\u003e\n\u003ch3\u003eWhat You Need for Treatment\u003c\/h3\u003e\n\u003cp\u003eA bit of setup before the first dose saves trouble later.\u003c\/p\u003e\n\u003cul class=\"fph-symptom-list\"\u003e\n\u003cli\u003eA separate hospital or quarantine tank, so you are not treating the whole display.\u003c\/li\u003e\n\u003cli\u003eA heater and an air stone or sponge filter for steady temperature and strong aeration.\u003c\/li\u003e\n\u003cli\u003eAn ammonia and nitrite test kit to keep tabs on water quality.\u003c\/li\u003e\n\u003cli\u003eA dechlorinator for the water changes between doses.\u003c\/li\u003e\n\u003cli\u003eA small net and a clean cup for gentle transfer and for mixing the dose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"fph-tip\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always quarantine infected fish and birds away from healthy companions during treatment to reduce stress and help prevent the spread of disease. A small, dedicated hospital tank with a heater, air stone and no substrate makes dosing and water changes easier.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== MECHANISM ========== --\u003e\n\u003csection id=\"mechanism\" class=\"fph-section\"\u003e\n\u003ch2\u003eHow Fix Zithro Works\u003c\/h2\u003e\n\u003cp\u003eAzithromycin is the active part of Fix Zithro, at 250 mg per tablet. In simple terms, it helps slow or stop the growth of certain bacteria affecting the gills, skin and respiratory tract of ornamental fish and non-food pet birds.\u003c\/p\u003e\n\u003cp\u003eThe rest of each tablet is made up of standard ingredients that hold the tablet together, keep the azithromycin stable on the shelf, and let the tablet disperse and dissolve when added to aquarium water or mixed with soft food.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== SAFETY ========== --\u003e\n\u003cdiv id=\"side-effects\" class=\"fph-panel\"\u003e\n\u003ch2\u003eSafety and Tank Notes\u003c\/h2\u003e\n\u003cp\u003eWhen used as directed, Fix Zithro usually causes no problems in ornamental fish and non-food pet birds. As with any azithromycin product, incorrect amounts or prolonged use can increase the risk of side effects and resistance.\u003c\/p\u003e\n\u003cul class=\"fph-card-list\"\u003e\n\u003cli\u003e\n\u003ch3\u003eFish\u003c\/h3\u003e\n\u003cp\u003eAzithromycin-based fish treatments may cause temporary stress or hiding behavior, mild water cloudiness and reduced appetite during treatment. If fish show severe distress such as rapid gill movement, loss of balance, gasping at the surface or lying on the bottom, stop treatment, improve aeration and seek aquatic veterinary advice.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eBirds\u003c\/h3\u003e\n\u003cp\u003eWhen azithromycin is given in food or drinking water, possible reactions include decreased appetite, loose or changed droppings and lethargy, especially if the amount is too high or the bird is sensitive. If your bird appears fluffed up, inactive or stops eating, discontinue use and contact an avian veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eInvertebrates\u003c\/h3\u003e\n\u003cp\u003eDo not use Fix Zithro in display tanks that contain shrimp, snails or other invertebrates, as strong antibacterial treatments may harm them or disrupt the tank ecosystem. Whenever possible, move affected fish to a separate hospital tank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eSafe use in your system\u003c\/h3\u003e\n\u003cp\u003eTreat fish in a hospital or quarantine tank whenever you can, remove activated carbon and turn off UV sterilizers during treatment, and monitor ammonia, nitrite and temperature closely. Do not mix Fix Zithro with other antibacterial treatments unless advised by a veterinarian.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eImportant safety warning\u003c\/h3\u003e\n\u003cp\u003eFix Zithro is intended for \u003cstrong\u003eornamental aquarium fish and non-food pet birds only\u003c\/strong\u003e, and not for animals raised for food. Store tablets in a cool, dry place away from direct sunlight and keep out of reach of children and pets. Always follow the directions on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003c!-- ========== SHIPPING ========== --\u003e\n\u003csection id=\"shipping\" class=\"fph-section\"\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eShipping Policy:\u003c\/strong\u003e Orders ship from our U.S. warehouse within 1 business day via USPS or UPS, with same-day dispatch on orders placed before 1:30 p.m. CT (Monday through Friday). For full shipping details, please see our \u003ca href=\"https:\/\/finepethealth.com\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eRefund Policy:\u003c\/strong\u003e If there is an issue with your order, you may be able to return or exchange items within 30 days according to our store guidelines. Before sending anything back, please review our \u003ca href=\"https:\/\/finepethealth.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e carefully.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== FAQ ========== --\u003e\n\u003csection id=\"faq\" class=\"fph-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"fph-faq-list\"\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is Fix Zithro (Bird Zithro) used for in fish and birds?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zithro (azithromycin 250 mg) is an antibacterial treatment used by hobbyists to help manage bacterial issues such as fin and tail rot, columnaris or gill disease in ornamental aquarium fish, and to support veterinarian-directed treatment of mild respiratory or Mycoplasma-related problems in non-food pet birds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between Bird Zithro and Fix Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eBird Zithro was the brand name used by Thomas Labs for their azithromycin 250 mg tablets. After Thomas Labs discontinued the product, Aqua Soma Labs introduced Fix Zithro as a direct replacement. Fix Zithro contains the same 250 mg azithromycin per tablet, uses the same crushable tablet format, and is intended for the same ornamental fish and pet bird applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zithro a replacement for Aqua Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. If you previously used Aqua Zithro 250 mg, Fix Zithro from Aqua Soma Labs is a direct replacement with the same azithromycin (250 mg per tablet) and is available in the same 12-count and 30-count bottle sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zithro the same as Fish Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFish Zithro was another name used for azithromycin fish treatment products. Fix Zithro from Aqua Soma Labs contains the same 250 mg azithromycin and is a modern replacement for older Fish Zithro products that are no longer manufactured.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhere can I buy azithromycin for fish online?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYou can buy Fix Zithro (azithromycin 250 mg) directly from Fine Pet Health. Orders ship from our U.S. warehouse with same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday, via USPS or UPS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs azithromycin stronger than amoxicillin for fish?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNeither one is simply stronger. They work against different bacteria, so the better choice depends on what is making the fish sick. Azithromycin is in Fix Zithro; amoxicillin is in \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eFix Mox\u003c\/a\u003e. It helps to confirm the likely bacteria with an aquatic vet or an experienced aquarist before you choose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eHow do I know if my fish might need a fish azithromycin treatment?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eWatch for signs such as frayed or rotting fins, red or white ulcers, fuzzy patches that suggest columnaris, labored breathing or listless behavior that does not improve with good water quality and husbandry. A fish veterinarian or experienced aquarist can help confirm whether a bacterial infection is likely and whether azithromycin treatment is appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs azithromycin for birds the same as fish azithromycin?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eSame azithromycin. Fix Zithro gives you 250 mg azithromycin per tablet for both ornamental fish and non-food pet birds. What changes is the amount: fish go by tank volume, birds go by body weight, and a bird should only be treated when an avian vet has set the amount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat size aquarium can one Fix Zithro tablet treat?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eOne 250 mg tablet treats approximately 10 gallons (38 liters) of aquarium water. For a 20-gallon hospital tank, you would use two tablets at a time. Always dose based on the actual water volume in the treatment tank, not the manufacturer-listed tank size, since gravel, decorations and equipment reduce usable volume.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs fish azithromycin available in 500 mg?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFix Zithro comes as \u003cstrong\u003e250 mg tablets\u003c\/strong\u003e only. If you need 500 mg total, use two 250 mg tablets per the label directions or your veterinarian's guidance. Measure the tank volume or the bird's body weight first, and do not go past the schedule on the label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eHow long should I treat with Fix Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eFor fish, many hobbyists follow the label directions of one 250 mg tablet per 10 gallons (38 L) once every 24 hours for \u003cstrong\u003e5 to 7 days\u003c\/strong\u003e, or as advised by an aquatic veterinarian. Birds should only receive Fix Zithro for the amount and duration recommended by an avian vet, who will decide how long treatment should continue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eHow soon should I see improvement with Fix Zithro?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eMany hobbyists begin to see early signs of improvement within 3 to 5 days, such as fin damage and red patches no longer spreading, steadier breathing and a returning appetite. Keep the water clean and keep dosing on schedule throughout. If you see no change by day 5, or the fish look worse, stop and ask an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eWhat should I do after finishing Fix Zithro treatment?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eAfter the last day of treatment, run a partial water change and put activated carbon back in the filter to clear any leftover azithromycin from the water. Keep monitoring water quality and watch the fish for a few more days to confirm the infection does not return.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan I use Fix Zithro in my main community or reef tank?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eIt is best to treat sick fish in a separate hospital tank instead of the main aquarium. Fix Zithro and other fish azithromycin products are not recommended for reef tanks or setups with shrimp, snails, corals or other invertebrates, because strong antibacterial treatments may harm them or disrupt beneficial filter bacteria.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eDoes Fix Zithro work in saltwater aquariums?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fix Zithro can be used in both freshwater and saltwater hospital tanks. Dissolve the tablet following the standard amount (one 250 mg tablet per 10 gallons) and maintain stable salinity, temperature and water quality throughout the treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Zithro be used for racing pigeons?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003ePigeon keepers use azithromycin under veterinary guidance for respiratory and Mycoplasma-related concerns in racing and show pigeons. Fix Zithro provides the same 250 mg azithromycin per tablet found in older Bird Zithro products that were widely used in loft management. Always consult an avian vet for the correct amount and schedule before treating pigeons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan I combine Fix Zithro with other fish treatments?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eCombining antibacterial treatments or mixing Fix Zithro with antifungal or antiparasitic treatments is generally not recommended unless specifically advised by an aquatic veterinarian. Using several treatments at once can stress fish, cause unpredictable interactions and make it harder to identify which one is working.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eCan Fix Zithro treat fungal, viral or parasitic infections?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eNo. Fix Zithro is an azithromycin antibacterial treatment for fish and birds that targets certain bacterial infections only. It is not effective against fungi, viruses or parasites such as ich, flukes or worms. For fungal, parasitic or viral problems, work with an aquatic or avian veterinarian to choose an appropriate treatment instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eIs Fix Zithro safe for betta fish and small aquariums?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eYes. Fix Zithro can be used in small hospital tanks for bettas and other individual fish. Because bettas are often kept in tanks under 10 gallons, you may need to split a tablet to achieve the correct dose (one 250 mg tablet per 10 gallons). Dissolve the portion in a small cup of tank water before adding it to the hospital tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"fph-faq-item\"\u003e\n\u003csummary\u003eHow should I store and dispose of Fix Zithro tablets?\u003c\/summary\u003e\n\u003cdiv class=\"fph-faq-answer\"\u003e\n\u003cp\u003eStore tablets in their original container in a cool, dry place away from heat, moisture, children and pets. For disposal, follow your local guidance for safe household disposal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c!-- ========== MORE TREATMENTS ========== --\u003e\n\u003csection class=\"fph-section\"\u003e\n\u003ch2\u003eMore Fish \u0026amp; Bird Treatments\u003c\/h2\u003e\n\u003cdiv class=\"fph-info-grid\"\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Mox (Amoxicillin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, dropsy, ulcers and other bacterial infections in ornamental fish. Available in 30-count and 100-count capsules. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-mox\"\u003eShop Fix Mox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Zole (Metronidazole) 250\/500mg\u003c\/strong\u003e Targets anaerobic bacteria and protozoa including Hexamita and hole-in-the-head disease in ornamental fish. Available in 60-count bottles. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-zole\"\u003eShop Fix Zole\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Doxy (Doxycycline) 100mg\u003c\/strong\u003e A treatment for columnaris, respiratory infections and Mycoplasma in fish and birds. Available in 30-count and 60-count tablets. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-doxy\"\u003eShop Fix Doxy\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Cin (Clindamycin) 150mg\u003c\/strong\u003e A treatment for gram-positive bacterial infections, including skin and soft tissue concerns in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-cin\"\u003eShop Fix Cin\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Sulfa (SMZ\/TMP) 960mg\u003c\/strong\u003e A treatment for a range of bacterial infections in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-sulfa\"\u003eShop Fix Sulfa\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Pen (Penicillin) 500mg\u003c\/strong\u003e A treatment for gram-positive bacterial infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-pen\"\u003eShop Fix Pen\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flex (Cephalexin) 250\/500mg\u003c\/strong\u003e A treatment for fin rot, ulcers and bacterial skin infections in ornamental fish and non-food pet birds. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flex\"\u003eShop Fix Flex\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eFix Flox (Ciprofloxacin) 500mg\u003c\/strong\u003e A treatment for gram-negative bacterial infections including fin rot, ulcers, columnaris and septicemia in ornamental fish. \u003ca href=\"https:\/\/finepethealth.com\/products\/fish-flox\"\u003eShop Fix Flox\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eBrowse all treatments\u003c\/strong\u003e Explore our complete \u003ca href=\"https:\/\/finepethealth.com\/collections\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterial Collection\u003c\/strong\u003e\u003c\/a\u003e for more Fix line products and related treatments.\u003c\/p\u003e\n\u003cp class=\"fph-info-card\"\u003e\u003cstrong\u003eGuides and treatment tips\u003c\/strong\u003e Visit the \u003ca href=\"https:\/\/finepethealth.com\/blogs\/fish-and-bird-antibacterials\" rel=\"noopener\"\u003e\u003cstrong\u003eFish \u0026amp; Bird Antibacterial Care Blog\u003c\/strong\u003e\u003c\/a\u003e for practical care guides, water-care advice and treatment tips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Aqua Soma Labs","offers":[{"title":"250-mg (12 Count)","offer_id":49081494503674,"sku":"434604","price":30.8,"currency_code":"USD","in_stock":false},{"title":"250-mg (30 Count)","offer_id":49081494536442,"sku":"218534","price":75.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/5244\/9786\/files\/fish-zithro-azithromycin-250mg-12-count-fish-antibacterial.webp?v=1782551698","url":"https:\/\/finepethealth.com\/products\/fish-zithro","provider":"Fine Pet Health","version":"1.0","type":"link"}