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Need help? Call us at (913) 325-2686
Family run, USA based
Smart choices for pet owners
Quality nutrition for every life stage
Everything your pet needs, in one place
Need help? Call us at (913) 325-2686
Family run, USA based
Smart choices for pet owners
Quality nutrition for every life stage
Everything your pet needs, in one place
Need help? Call us at (913) 325-2686
Family run, USA based
Smart choices for pet owners
Quality nutrition for every life stage
Everything your pet needs, in one place
Need help? Call us at (913) 325-2686
Family run, USA based
Smart choices for pet owners
Quality nutrition for every life stage
Everything your pet needs, in one place
Need help? Call us at (913) 325-2686
Family run, USA based
Smart choices for pet owners
Quality nutrition for every life stage
Everything your pet needs, in one place

Fish Sulfa

Barcode : 694485673059
SKU : AS-023-PET
Ships within 1 business day

Regular price $64.95 $64.95 0% OFF


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Fish Sulfa

Fish Sulfa

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Product Details

Fix Sulfa (Sulfamethoxazole & Trimethoprim) 800mg/160mg Tablets

Fix Sulfa (Sulfamethoxazole & Trimethoprim) provides synergistic broad-spectrum antibacterial care formulated for ornamental marine and freshwater fish. Offered in double-strength 800 mg/160 mg tablet options, it combines two active antibacterial agents to combat persistent systemic and surface-level bacterial infections in aquarium environments. The dissolvable tablets disperse cleanly into tank water or can be crushed and incorporated into food to deliver targeted treatment without artificial dyes or unnecessary fillers.

Features and Benefits

  • Synergistic Dual-Antibiotic Formula: Combines sulfamethoxazole (800 mg) and trimethoprim (160 mg) for enhanced antibacterial efficacy against susceptible aquatic pathogens.
  • Potent Combination Strength: Delivered in precise 800 mg/160 mg tablet proportions to simplify accurate dosing for medium to large aquarium volumes.
  • Pure Active Ingredients: Formulated with pharmaceutical-grade sulfamethoxazole and trimethoprim with zero artificial dyes or unnecessary chemical fillers.
  • Multi-Condition Relief: Formulated to help manage severe bacterial conditions including mouth fungus (Flexibacter columnaris), fin rot, tail rot, hemorrhagic septicemia, skin ulcers, and body lesions.
Usage Guidelines & Instructions
1. Quarantine Setup & Water Preparation Isolate affected fish in a dedicated hospital tank prior to medication. Discontinue chemical filtration (activated carbon) and turn off UV sterilizers during administration, as these pull active sulfa compounds from solution. Performing a partial water change beforehand minimizes organic waste and reduces environmental stress.
2. Aquarium Dosing Instructions Add one tablet (800 mg Sulfamethoxazole / 160 mg Trimethoprim) per 20 gallons (76 L) of aquarium water. Crush the tablet into a fine powder, pre-dissolve it in a cup of warm aquarium water, and distribute the mixture evenly across the water surface. Repeat the dosage every 24 hours for 5 to 10 consecutive days. Conduct a partial water change between treatments. Discontinue use and consult a veterinarian if no clinical improvement is observed within 5 days.
3. Administration in Non-Food Avian Species Fix Sulfa may be administered to non-food pet birds (such as pigeons) strictly under the direct guidance, diagnosis, and prescribed dosage schedule of a licensed avian veterinarian. Tablets are typically crushed and incorporated into soft feed or dissolved in drinking water according to veterinary directives.
4. Water Quality Management & Post-Treatment Care Maintain high aeration and closely monitor essential water parameters, including ammonia and nitrite, throughout the treatment course. Complete the full duration of therapy to prevent bacterial resistance or symptom relapse. Upon completion, perform a partial water change and reintroduce activated carbon filtration to clear residual medication.
How Fix Sulfa Works +

Fix Sulfa combines sulfamethoxazole and trimethoprim, two antibacterial agents that produce a sequential double-blockade in bacterial folic acid synthesis.

Sulfamethoxazole inhibits dihydropteroate synthase, while trimethoprim inhibits dihydrofolate reductase. Together, they disrupt nucleic acid and protein production, converting two bacteriostatic compounds into a potent bactericidal treatment against susceptible target organisms.

Safety and Tank Notes +

Caution: Keep out of reach of children. Fix Antibiotics are for aquarium use only. Intended for ornamental fish and/or ornamental organisms, and not intended for use with fish that are intended for human consumption.

Broad-spectrum sulfa combinations can affect beneficial nitrifying biological filter bacteria. Dosing in a dedicated hospital tank is strongly advised to protect your main aquarium's biofilter.

Storage: Keep container lid tightly closed and store in a cool, dry place at controlled room temperature of 59°–86°F (15°–30°C).

Fish Sulfa vs Fix Sulfa: What Changed? +

If you previously relied on legacy products like Thomas Labs Fish Sulfa or Aqua Sulfa, those specific brand lines are discontinued or scarce. Fix Sulfa from SourceMax Labs serves as a direct alternative, offering the identical active combination strengths for aquarium care.

Identical Active Combination Fix Sulfa provides 800 mg Sulfamethoxazole and 160 mg Trimethoprim per tablet, matching established aquarist expectations.
Updated Compliant Packaging Manufactured by SourceMax Labs with clear, modern labeling featuring dosage guidelines and storage notes.
Crushable Tablet Format Features scored tablets that crush cleanly for pre-dissolving into tank water or blending into food.
Fresh Factory Production Directly supplied from recent production batches complete with clearly printed expiration dates.

Frequently Asked Questions

Do I need a prescription to buy Fix Sulfa? +
No prescription is required. Fix Sulfa is an over-the-counter antibiotic treatment formulated specifically for ornamental fish and aquarium care.
What conditions does sulfamethoxazole/trimethoprim treat in aquarium fish? +
It targets broad-spectrum bacterial infections including mouth fungus (columnaris), fin rot, tail rot, skin ulcers, hemorrhagic septicemia, and body lesions.
Can Fix Sulfa be used on dogs, cats, or humans? +
No. Fix Sulfa is strictly labeled and intended for ornamental fish and non-food organisms. It should never be consumed by humans or administered to mammals.
Will Fix Sulfa harm my biological filter? +
As a broad-spectrum dual-antibacterial treatment, sulfa combinations can affect beneficial biological filter colonies. Dosing in a separate quarantine or hospital tank is strongly recommended.
How do I prepare the tablets before adding them to the tank? +
Crush the required tablet amount into a fine powder, mix thoroughly into a cup of warm aquarium water until suspended, and pour evenly across the surface of the tank.
Should chemical filtration and UV sterilizers remain off? +
Yes, remove activated carbon and turn off UV sterilizers throughout the treatment duration, as they remove active sulfa medication from the water.
How long should the treatment bath continue? +
Daily treatment baths should run for a minimum of 5 days and no more than 10 days. If no clinical improvement is observed within 5 days, discontinue use and consult an aquatic vet.
Shipping & Returns

Shipping: All orders ship from trusted U.S. facilities via USPS Ground Advantage, USPS Priority, FedEx, or UPS. Standard orders process in 1–3 business days and arrive within 3–6 business days. Standard rates start around $5.99, and expedited options (2–3 business days) are available at checkout when eligible. Tracking details are emailed automatically once your order is placed. Orders with items from multiple warehouses may arrive in separate packages at no extra cost.

Returns: Unused, unopened items in original packaging can be returned within 30 days of delivery with prior authorization. For pet safety, opened consumables, treats, food, and fish medications cannot be returned. Return shipping is covered by the customer unless the item arrives damaged or incorrect.

Damaged or Incorrect Orders: If your order arrives damaged or incorrect, email sales@thepetperch.com within 7 days of delivery with your order number and photos. We’ll send a replacement or issue a full refund immediately at no cost to you.

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