Fish Sulfa (Sulfamethoxazole/Trimethoprim) 960mg – 30 Tablets

Dual-Action Antibiotic for Tough Bacterial Fish Infections

Fish Sulfa Tablets deliver potent two-in-one antibacterial protection for aquarium fish. Combining 400mg of Sulfamethoxazole and 80mg of Trimethoprim, this fast-acting treatment tackles both gram-positive and gram-negative bacterial infections — ideal for cases like fin rot, tail rot, columnaris, and gill disease.

Formulated for freshwater and saltwater environments, this trusted medication works quickly without disrupting your tank’s natural balance. Browse our full collection of fish antibiotics for more solutions.

Why Choose Fish Sulfa Tablets?

• Dual-Action Formula: Sulfamethoxazole halts bacterial growth while Trimethoprim enhances its effectiveness.
• Wide-Spectrum Power: Treats a range of aquatic diseases like fin rot, columnaris, and gill infection.
• Fast Results: Most fish show improvement within 24–48 hours of the first dose.
• Safe Use in Tanks: Works in both freshwater and marine systems without harming plants.
• Easy to Dose: Pre-measured tablets dissolve cleanly and reduce dosing errors.

Directions for Use

• Remove activated carbon or charcoal filters before treatment begins.
• Add 1 tablet (960mg) per 10 gallons of aquarium water.
• Repeat once every 24 hours for up to 5 days or as directed by an aquatic specialist.
• After the final dose, perform a 25% water change and resume filtration.

Active Ingredients

• Sulfamethoxazole (400 mg): Inhibits bacterial folic acid production.
• Trimethoprim (80 mg): Boosts sulfamethoxazole’s effect, offering broad bacterial coverage.

Possible Side Effects

• Mild stress or sluggishness in sensitive species.
• Temporary cloudiness of aquarium water.
• Antibiotic resistance may develop with unnecessary or prolonged use.

Storage Instructions

• Keep sealed tightly in a cool, dry area (59°–86°F or 15°–30°C).
• Protect from direct sunlight and moisture.
• Check expiration date before use.

Precautions

• For ornamental aquarium use only — not for food fish or human consumption.
• Do not exceed recommended dosage to avoid toxicity.
• Monitor water parameters during treatment and after water changes.

Have questions about your order? Visit our Shipping Policy and Refund Policy for details.

FAQs – Fish Sulfa 960mg Tablets

• What does Fish Sulfa treat?
  It’s designed for bacterial infections like fin rot, tail rot, gill disease, and columnaris.
• Is it safe for planted aquariums?
  Yes. Fish Sulfa does not harm most live aquarium plants.
• Can it be used in saltwater?
  Absolutely. It works well in both saltwater and freshwater aquariums.
• Will it hurt shrimp or snails?
  Use caution. Remove invertebrates before treatment as they may be affected.
• How fast does it work?
  You may notice symptom relief within 24–48 hours of initial dosing.
• Can I use this in a hospital tank?
  Yes, Fish Sulfa is perfect for treating isolated or newly introduced fish.
• Does it impact the nitrogen cycle?
  It may affect beneficial bacteria. Re-dose bacterial cultures after treatment.
• Should I feed during treatment?
  Yes, lightly feed to reduce waste buildup. Avoid overfeeding.
• How can I prevent reinfection?
  Maintain clean water, avoid overcrowding, and always quarantine new arrivals.
• Where can I buy Fish Sulfa online?
  Order directly at DogsAntibiotics.com — no vet prescription needed and fast USA shipping.