Fish Zole (Metronidazole) 500mg 60 Count
$89.99 $99.95
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Fish Zole (Metronidazole) 500mg – 60 Count | High-Potency Aquarium Antibiotic for Parasites & Anaerobic Infections
Fish Zole (Metronidazole) 500mg Tablets are a high-strength solution for treating severe internal and external infections in aquarium fish. Each tablet delivers 500mg of Metronidazole, a powerful antimicrobial agent effective against protozoan parasites and anaerobic bacteria. Ideal for conditions like hole-in-the-head disease, Hexamita, Ich, gill flukes, and internal bacterial infections, this medication supports full recovery in both freshwater and saltwater systems.
Fish Zole dissolves easily for even distribution in tank water, making it a trusted choice among aquarists seeking fast, effective treatment.
Key Benefits of Fish Zole (Metronidazole) 500mg Tablets
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Targets Protozoan Parasites
Effectively treats Ichthyophthirius (Ich), Hexamita, and Costia responsible for white spot disease and hole-in-the-head. -
Fights Anaerobic Bacterial Infections
Addresses infections like fin rot, tail rot, and septicemia caused by anaerobic bacteria. -
Internal and External Infection Control
Works systemically and topically, promoting thorough healing across affected tissues. -
Preserves Aquarium Balance
Unlike many antibiotics, Fish Zole minimizes disruption to beneficial bacteria, preserving biological filtration. -
Fast Dissolving Formula
Ensures rapid absorption and efficient treatment, even in large-volume tanks. -
Safe for All Aquarium Types
Suitable for both freshwater and saltwater environments when dosed as directed.
How to Use Fish Zole (Metronidazole) Tablets
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Dosage: 1 tablet (500mg) per 10 gallons of aquarium water
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Frequency: Dose every 24 hours
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Water Changes: Perform partial water change before each dose
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Treatment Duration: 5–10 days based on infection severity
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Tip: Remove activated carbon filters during treatment to prevent deactivation of medication
Ingredients
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Active Ingredient: Metronidazole 500mg – Broad-spectrum antimicrobial
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Other Ingredients: Inert binders for tablet stability and solubility
Warnings and Precautions
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Not intended for fish used for human consumption
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May harm invertebrates such as shrimp and snails
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Use a hospital tank when treating sensitive species
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Store between 59°–86°F (15°–30°C) in a cool, dry area
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Keep tightly closed and out of reach of children and pets
Potential Side Effects
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Temporary lethargy in sensitive fish
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May affect invertebrates if not removed from the tank
FAQs – Fish Zole (Metronidazole) 500mg for Aquarium Use
What is Fish Zole used for?
Fish Zole treats protozoal and bacterial infections such as Hexamita, Ich, internal parasites, and gill flukes in aquarium fish.
Can Fish Zole be used preventively?
No. It is designed for active infections. Preventive use risks creating resistant strains of bacteria or parasites.
Is it safe for all types of fish?
Generally yes, but invertebrates and sensitive species should be treated in a separate tank for safety.
How quickly will results appear?
Many fish show improvement within 3–5 days, including improved appetite and reduced symptoms.
How should I care for the tank post-treatment?
Perform a water change, reintroduce carbon filtration, and monitor water quality before returning invertebrates or breeding species.
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Shipping & Returns
We offer flexible shipping methods including Ground, Express, Priority, and International services.
Review our full Shipping Policy and Refund Policy for complete details.
Your order of 49$ or more gets free standard delivery.
- Standard delivered 4-5 Business Days
- Express delivered 2-4 Business Days
Orders are processed and delivered Monday-Friday (excluding public holidays)
members enjoy free returns.


