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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 Zole

Barcode : 694485673141
SKU : AS-027-PET
Ships within 1 business day

Regular price $35.95 $0.00 Liquid error (blocks/_product-price line 31): divided by 0% OFF


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Fish Zole

Fish Zole

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Product Details

Fix Zole (Metronidazole) 250mg & 500mg Capsules

Fix Zole (Metronidazole) provides effective broad-spectrum antiprotozoal and antibacterial care for ornamental marine and freshwater fish. Available in both 250 mg and 500 mg strength options, it is designed to combat anaerobic bacterial infections and persistent internal protozoan parasites in aquarium setups. The water-soluble powder inside each pull-apart capsule dissolves cleanly into tank water or can be incorporated into food to deliver targeted treatment without artificial dyes or unnecessary fillers.

Features and Benefits

  • Dual-Action Antiparasitic & Antibacterial: Exerts a potent effect against anaerobic bacteria and internal flagellated protozoans affecting aquarium fish.
  • Multiple Strength Options: Offered in 250 mg and 500 mg capsule strengths to allow precise dosing across various aquarium volumes.
  • Pure Active Ingredient: Formulated with pharmaceutical-grade metronidazole with zero artificial additives, dyes, or unnecessary chemical fillers.
  • Targeted Condition Relief: Helps treat common aquatic conditions including Hole-in-the-Head disease (Hexamita), internal parasites, bloat, and anaerobic bacterial lesions.
Usage Guidelines & Instructions
1. Quarantine Setup & Water Preparation Isolate affected fish in a separate hospital tank prior to medication. Discontinue chemical filtration (activated carbon) and turn off UV sterilizers during treatment, as these pull active metronidazole from solution. Performing a partial water change beforehand minimizes organic waste and reduces environmental stress.
2. Aquarium Dosing Instructions Add the contents of one 250 mg capsule per 10 gallons (38 L) or one 500 mg capsule per 20 gallons (76 L) of aquarium water. Separate the capsule halves, pre-dissolve the powder in a small container of aquarium water, and distribute evenly across the water surface. Repeat the dose every 24 hours for 5 to 10 days. Conduct a partial water change between consecutive treatments. Discontinue use and consult a veterinarian if no improvement is noted within 5 days.
3. Administration in Non-Food Avian Species Fix Zole may be administered to non-food pet birds (such as pigeons) strictly under the direct supervision and dosage regimen prescribed by a licensed avian veterinarian. Capsules are typically opened and thoroughly incorporated into soft food or dissolved in fresh drinking water to ensure complete delivery. Follow veterinary orders exclusively regarding dosage and treatment duration.
4. Water Quality Management & Post-Treatment Care Maintain high aeration and closely monitor water parameters, including ammonia and nitrite, throughout the treatment regimen. Complete the full course of therapy to prevent relapse. Upon completion, perform a partial water change and reintroduce activated carbon filtration to remove residual medication.
How Fix Zole Works +

Fix Zole contains metronidazole, a synthetic nitroimidazole antiprotozoal and antibacterial agent.

It works by disrupting DNA synthesis and nucleic acid structure in anaerobic bacteria and protozoans, effectively halting cellular repair and destroying target microorganisms in aquatic species.

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.

Dosing in a dedicated hospital tank is recommended. Monitor water parameters daily if treating in a main display tank.

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

Fish Zole vs Fix Zole: What Changed? +

If you previously relied on legacy brands like Thomas Labs Fish Zole or Aqua Zole, those specific labels are discontinued or scarce. Fix Zole from SourceMax Labs serves as a direct replacement, delivering the same active ingredient strengths and capsule format for aquarium care.

Identical Active Metronidazole Fix Zole provides pharmaceutical-grade metronidazole (250 mg or 500 mg per capsule), matching historical aquarist expectations.
Updated Compliant Packaging Manufactured by SourceMax Labs with clear, modern labeling featuring dosage guidelines and storage instructions.
Dissolving Capsule Format Features pull-apart capsules that dissolve smoothly in water, maintaining the familiar administration process.
Fresh Factory Production Directly supplied from recent production runs complete with clearly printed expiration dates.

Frequently Asked Questions

Do I need a prescription to buy Fix Zole? +
No prescription is required. Fix Zole is an over-the-counter antiparasitic and antibacterial treatment formulated specifically for ornamental fish.
What conditions does metronidazole treat in aquarium fish? +
It effectively targets internal protozoan parasites like Hexamita (Hole-in-the-Head disease), bloat, intestinal flagellates, and anaerobic bacterial infections.
Can Fix Zole be used on dogs, cats, or humans? +
No. Fix Zole 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 Zole affect beneficial nitrifying bacteria in my filter? +
Metronidazole targets anaerobic bacteria and protozoans, making it generally safer for aerobic nitrifying filter bacteria than standard broad-spectrum antibiotics, but using a hospital tank is still recommended.
How do I mix and apply the capsules? +
Separate the capsule halves, pour the dry powder into a cup of warm aquarium water, stir thoroughly until dissolved, and add the mixture evenly across the water surface.
Should chemical filtration and UV sterilizers remain off? +
Yes, remove activated carbon and turn off UV sterilizers throughout the treatment duration, as they neutralize or extract active 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. Discontinue treatment and consult an aquatic vet if no improvement is noted within 5 days.
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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