Fix Cin 150 mg (Clindamycin) 100 Doses Fish Antibiotic

Clindamycin for Fish: Fix Cin (Fish Cin) 150 mg Capsules - 100 Doses

Fix Cin 150 mg (Clindamycin) (often called Fish Cin in the hobby community) is an Aqua Soma Labs fish antibiotic used by aquarists for ornamental aquarium fish when bacterial infections are suspected. It is typically selected for gram-positive and many anaerobic bacteria, and is commonly used for hobby problems described as fin and tail rot, mouth rot or cotton-mouth (often miscalled “mouth fungus”), skin ulcers or lesions, and certain internal infections.

Clindamycin for fish works by interfering with bacterial protein production, helping slow the growth of susceptible bacteria so fish can recover with less ongoing stress. Antibiotics are for bacterial infections only, so matching treatment to the likely cause matters.

Each capsule contains 150 mg clindamycin, and this bottle provides a 100-dose supply for larger aquariums or repeat treatment cycles. It is a convenient capsule format for freshwater and saltwater keepers who want consistent dosing and straightforward planning in a hospital tank or quarantine setup.

Important Notice: This product is intended for aquarium and ornamental fish only. It is not for human consumption or for animals used for food. We do not sell or recommend this product for human use.

Use Fix Cin when you notice early signs of bacterial stress such as clamped or frayed fins, reddened areas, open sores, cottony mouth damage, listlessness, or a persistent loss of appetite. Addressing potential bacterial issues early, together with clean water, strong aeration, and stable parameters, helps protect the rest of the tank while the affected fish recovers. If your display tank contains shrimp or snails, consider treating fish in a separate hospital tank to reduce risk.

What Are the Benefits of Fix Cin (Fish Cin) Clindamycin Capsules for Fish?

• Broad-Spectrum Support for Common Bacterial Aquarium Problems

  Fix Cin (Fish Cin) is a clindamycin for fish option commonly chosen when gram-positive or anaerobic bacteria may be involved in fin damage, mouth irritation, ulcers, or slow-healing wounds in ornamental fish.

• Helpful for External Lesions and Wound-Type Issues

  Aquarists often reach for fish clindamycin when they see redness, open sores, frayed fins, or recurring skin lesions that may be linked to bacterial stress.

• Support for Internal Bacterial Concerns

  Fix Cin can be used in a treatment setup when fish show ongoing appetite loss, low activity, or digestive-type signs that can sometimes accompany internal bacterial infections.

• Consistent 150 mg Clindamycin Capsules

  Each capsule provides a reliable 150 mg clindamycin dose, helping make treatment planning simpler for both freshwater and saltwater aquariums.

• 100-Dose Bottle for Repeat Cycles and Larger Tanks

  The 100-dose supply is practical for community tanks, multi-fish treatment cycles, and keepers who maintain a dedicated quarantine system. Many hobbyists search for this format as clindamycin fish antibiotics or fish antibiotics clindamycin.

• Hospital Tank Friendly to Help Limit Main-Tank Disruption

  Using Fix Cin in a separate hospital tank helps focus treatment where it is needed most and can help reduce stress on the main aquarium’s routine. Monitor ammonia and aerate well during any antibiotic treatment.

How to Dose & Use Fix Cin (Fish Cin) Clindamycin 150 mg for Fish

Directions for Use:

1. Set Up a Separate Treatment Tank

   Move affected fish to a hospital tank when possible to make dosing easier and help protect healthy tank mates. If you use chemical filtration (like activated carbon), remove it during treatment, and turn off UV sterilizers if present. Increase aeration in the treatment tank.

2. Dose by Aquarium Water Volume

   Add one capsule (150 mg) per 10 gallons (38 L) of aquarium water to be treated. For faster dispersal, many hobbyists pre-mix the contents in a small cup of aquarium water first, then add it to the tank.

3. Repeat Every 24 Hours

   Repeat the dose every 24 hours.

4. Perform Partial Water Changes Between Doses

   Perform a partial water change between treatments to support water quality. Monitor fish behavior and basic water parameters during the course.

5. Continue for 5 to 10 Days

   Continue treatment for 5 to 10 days, depending on infection severity.

6. Stop if There Is No Improvement by Day 5

   If no improvement is seen within 5 days, discontinue use and reassess the likely cause. Consider guidance from an aquatic veterinarian or fish health professional, especially if symptoms worsen.

7. Clear Harmless Yellow Tint After Treatment

   To remove harmless yellow discoloration, change 20% of the water and run a charcoal (activated carbon) filter until the water clears.

Pro Tip: Antibiotic treatments can impact biological filtration in some setups, so test ammonia and nitrite and keep aeration high during the course.

How Does Fix Cin (Fish Cin) Clindamycin Work Against Bacteria in Fish?

• Active ingredient: Clindamycin hydrochloride (150 mg per capsule)

  Clindamycin is a lincosamide antibiotic that inhibits bacterial protein synthesis by binding to the 50S ribosomal subunit (23S rRNA). This helps slow the growth of susceptible bacteria so fish can recover with good supportive care.

  Its activity depends on the organism and conditions, so it should be used when a bacterial infection is likely and alongside strong husbandry and stable water quality.

• Inactive ingredients

  Capsule shell and excipients help form the capsule and support product stability. In many retail listings, the full inactive ingredient list is not individually detailed.

Quick note: If symptoms do not improve, reassess the likely cause and follow the dosing directions above.

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FAQs About Fix Cin (Fish Cin) Clindamycin 150 mg for Fish

What is Fix Cin (clindamycin) used for in fish?
Fix Cin is a clindamycin for fish product used by aquarists when a bacterial infection is suspected in ornamental aquarium fish. It is commonly chosen when gram-positive or anaerobic bacteria may be involved in fin damage, mouth irritation, ulcers, or slow-healing wounds.

Is Fix Cin the same as Fish Cin or “fish clindamycin”?
Yes. Fish Cin is the older hobby name, and Fix Cin is the current product name. If you searched fish clindamycin, clindamycin fish antibiotics, or fish antibiotics clindamycin, you are looking at the same clindamycin category used in aquariums.

How do I know if my fish might need clindamycin?
Common signs that may be linked to bacterial stress include frayed fins, red streaking, open sores, worsening mouth tissue, lethargy, or persistent appetite loss. Because different problems can look similar, confirm water quality is stable and reassess symptoms before starting any antibiotic.

Can Fix Cin treat fungal, parasitic, or viral problems?
No. Fix Cin targets certain bacterial infections and does not treat parasites, viruses, or true fungal infections. If you see “cottony” growth, confirm the likely cause first since mouth damage is often mislabeled as “mouth fungus.”

Can I use Fix Cin in my main community tank?
Many keepers prefer treating in a separate hospital tank when possible. This helps protect healthy tank mates and makes dosing, observation, and water-quality control easier.

Is Fix Cin safe for saltwater fish or reef tanks?
Fix Cin is commonly used by both freshwater and saltwater hobbyists in a hospital tank. In reef or invertebrate systems (shrimp, snails, corals), a separate treatment tank is strongly preferred to reduce risk.

What is the recommended Fix Cin dose for fish?
A common aquarium dosing approach is one 150 mg capsule per 10 gallons (38 L) of water, repeated every 24 hours. Follow the label directions and the dosing section on this page, and support water quality with partial water changes as needed.

How long should I treat with Fix Cin?
Many hobbyists treat for 5 to 10 days depending on severity. If improvement begins, completing the full course can help reduce relapse as long as fish are tolerating treatment and water quality remains stable.

What if my fish shows no improvement after 5 days?
If there is no improvement by day 5, discontinue use and reassess the likely cause. Check water parameters and consider professional guidance since the problem may not be bacterial or may involve resistant organisms.

Will clindamycin affect beneficial bacteria in my aquarium?
Any antibiotic can stress a biofilter in some setups, especially if used in the main tank. Monitor ammonia and nitrite, keep aeration strong, and consider a hospital tank to help reduce risk to established filtration.

Can I mix Fix Cin with other medications?
Avoid combining Fix Cin with other antibiotics or treatments unless you have clear guidance from an aquatic veterinarian or fish health professional. Mixing products can increase stress and make it harder to identify what is helping or harming.

Can I use Fix Cin as a preventive treatment?
It is generally best not to use antibiotics preventively. Unnecessary use can increase stress and may contribute to antibiotic resistance, so focus on quarantine, clean water, and good husbandry unless treatment is truly needed.

Can I use Fix Cin for bettas or small tanks?
Fix Cin can be used in small setups when dosed correctly by water volume. Because the standard reference is per 10 gallons, measure and scale carefully to avoid overdosing, and consider a small hospital tank for easier control.

How does Fix Cin compare to other fish antibiotics?
Different antibiotics target different groups of bacteria. Clindamycin is often chosen when gram-positive or anaerobic involvement is suspected, while other products may be used for different patterns of infection. When symptoms are unclear, improving water quality and getting experienced guidance can help avoid trial-and-error.

How should I store and dispose of Fix Cin capsules?
Store in a cool, dry place away from direct sunlight. Keep the bottle tightly closed and out of reach of children and pets. Follow local guidance for medication disposal and avoid flushing unused capsules unless specifically instructed by local authorities.

More Fish Antibiotics

Need another aquarium fish antibiotic? Explore our Fish Antibiotics Collection for more Fix line and related treatments.

Looking for dosing and water-care advice? Visit the Fish Antibiotics Blog for practical guides and treatment tips.