Fix Cin (Fish Cin) Clindamycin 150mg 100ct Fish Antibiotic Capsules

Fix Cin (Fish Cin) Clindamycin 150 mg Capsules / 100 Doses

Fix Cin 150 mg (Clindamycin) is a pharmaceutical-grade, over-the-counter (OTC) clindamycin product from Aqua Soma Labs used by aquarists for ornamental aquarium fish when bacterial infections are suspected. It is often called Fish Cin in the hobby community and frequently sought as a reliable online alternative to discontinued Thomas Labs Fish Cin and Aqua-Cin.

Fix Cin 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"), bacterial dropsy, skin ulcers or lesions, deep tissue infections, swim bladder disease, and certain other internal infections. Each capsule contains 150 mg clindamycin with a dissolvable powder inside, and this bottle provides a 100-dose supply with fresh expiration dates for larger aquariums or repeat treatment cycles.

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.

Order online and get same-day dispatch on orders placed before 1:30 p.m. CT, Monday through Friday. Available to buy online with no veterinary prescription required, ships directly from our U.S. warehouse.

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.

Fish Cin vs Fix Cin: What Changed?

If you previously purchased Thomas Labs Fish Cin or Aqua-Cin, here is what has changed and what remains the same:

Benefits of Fix Cin for Fish

• Broad-Spectrum Support for Bacterial Aquarium Problems

  Fix Cin is an 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.

• No Veterinary Prescription Required

  Fix Cin is available over the counter (OTC). You can buy clindamycin for fish online without a prescription and have it shipped directly to your door.

• Helpful for External Lesions and Wound-Type Issues

  Aquarists often reach for this 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

  It 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, including deep tissue infections or swim bladder 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.

• Hospital Tank Friendly to 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.

Dosage Guidelines & Instructions

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 This Antibiotic Works

• 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.

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