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Fish Zole 500mg 60 Tablets

$89.99 $99.95

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Check Mark Notice: Dog antibiotics sold out. Fish antibiotics (same grade & content) in stock — select “Fish” in variations to order.
Type:

AS-007-AF

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Fish Zole (Metronidazole) 500mg – 60 Tablets

High-Potency Treatment for Internal Parasites and Bacterial Infections

Fish Zole 500mg Capsules provide a powerful defense against bacterial and protozoan infections in aquarium fish. Formulated with high-strength Metronidazole, this broad-spectrum fish antibiotic is effective against gill flukes, hole-in-the-head disease, Hexamita, and internal parasites—ensuring your fish regain health quickly in both freshwater and saltwater tanks.

Explore our full Fish Antibiotics Collection for more options.

Benefits of Fish Zole 500mg Capsules

  • Eliminates Parasites & Protozoa: Targets Ichthyophthirius, Costia, Hexamita, and other internal parasites.
  • Treats Anaerobic Bacterial Infections: Effective against fin rot, tail rot, and internal bacterial conditions.
  • Internal & External Action: Works through water absorption, treating fish from the inside out.
  • Minimal Impact on Biofilter: Unlike harsh treatments, Fish Zole preserves beneficial aquarium bacteria.
  • Safe Across Aquarium Types: Compatible with both freshwater and saltwater environments.

Learn more about our mission on the About Us page.

Directions for Use

  • Dosage: Add one 500mg capsule per 10 gallons of water.
  • Repeat: Treat every 24 hours with a partial water change before each new dose.
  • Duration: Continue treatment for 5–10 days depending on infection severity.
  • If No Improvement: Stop treatment after 5 days and consult an aquarist or vet.

Ingredients

Active Ingredient: Metronidazole 500mg

Other Ingredients: Inert binders used to stabilize capsule formulation

Side Effects

  • Some fish may exhibit temporary lethargy during treatment.
  • Harmful to invertebrates like snails and shrimp—remove before dosing.

Safe Use Guidelines

  • Remove carbon filters before treatment as they absorb the medication.
  • Monitor pH, ammonia, and nitrite levels during and after use.
  • For aquarium use only—do not use in food fish.

Storage Instructions

  • Store in a dry, cool area between 59°F–86°F (15°C–30°C).
  • Keep capsules sealed and away from moisture or direct sunlight.

For delivery options, see our Shipping Policy. For return info, visit our Refund Policy.

FAQs – Fish Zole (Metronidazole) 500mg Capsules

  • What infections does Fish Zole treat?
    Fish Zole is effective against Hexamita, Ichthyophthirius (Ich), internal parasites, and bacterial infections such as gill flukes, tail rot, and digestive disorders.
  • How does Metronidazole work?
    It stops DNA replication in protozoa and anaerobic bacteria, halting their growth and eliminating the infection.
  • Can Fish Zole prevent infections?
    No. It is a therapeutic treatment and should only be used when infections are diagnosed.
  • Is it safe for all aquarium fish?
    Yes, when used according to instructions. Avoid using with invertebrates or very sensitive species without vet approval.
  • Can I use Fish Zole in a quarantine tank?
    Yes. It’s ideal for treating new or sick fish during quarantine before introducing them to a main tank.
  • When will I see results?
    Most fish show improvement in behavior, color, and appetite within 3–5 days of starting treatment.
  • What should I do after treatment?
    Perform a 25% water change, reinsert carbon filters, and stabilize water quality before reintroducing sensitive tank mates.
  • Does it harm beneficial bacteria?
    No. Fish Zole targets harmful organisms without significantly disrupting your biofilter.
  • How should I dispose of leftover water or capsules?
    Do not flush. Dilute treated water before disposal and follow local regulations. Store capsules in original packaging.
  • Where can I buy trusted fish antibiotics online?
    At DogsAntibiotics.com — trusted source for fast-shipping fish medications without a prescription.

Buy fish antibiotics online without a vet prescription at DogsAntibiotics.com — trusted by aquarium keepers for safe, effective, and fast-acting fish medication delivered across the USA.

Your order of 100$ 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.

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