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Fish Zole 250mg 100 Capsules

$69.99 $79.99

In Stock

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Check Mark Notice: Dog antibiotics sold out. Fish antibiotics (same grade & content) in stock — select “Fish” in variations to order.
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AS-009-AF

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Fish Zole (Metronidazole) 250mg – 100 Capsules

Broad-Spectrum Treatment for Bacterial & Parasitic Infections

Fish Zole 250mg is a trusted aquarium medication containing Metronidazole—effective against a wide range of internal and external fish infections. This powerful treatment addresses protozoan parasites and anaerobic bacterial diseases like Hexamita, Ich (white spot), gill flukes, and hole-in-the-head. Whether in freshwater or marine environments, Fish Zole supports a faster recovery and a healthier aquatic system.

View more treatments in our Fish Antibiotics Collection.

Key Benefits of Fish Zole Capsules

  • Targets Parasites & Bacteria: Kills harmful protozoa (Hexamita, Ichthyophthirius) and anaerobic bacteria responsible for internal and external infections.
  • Effective for Multiple Conditions: Treats gill disease, fin rot, tail rot, and liver or intestinal infections.
  • Safe for Fresh & Saltwater Tanks: Compatible with most aquarium systems and won’t alter water pH or chemistry.
  • Protects Biofiltration: Minimizes impact on beneficial bacteria that support tank balance.
  • Quick Relief & Healing: Fish regain energy, appetite, and color within a few days of treatment.

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How to Use Fish Zole Capsules

  • Dosage: Add one 250mg capsule per 10 gallons of water every 24 hours.
  • Water Change: Perform a 25–30% water change before each daily dose.
  • Treatment Duration: Continue for 5–10 days based on the severity of the infection.
  • Note: Discontinue treatment if no improvement is seen after 5 days.

Ingredients

Active Ingredient: Metronidazole 250mg – Disrupts DNA synthesis in protozoan parasites and anaerobic bacteria.

Other Ingredients: Stable pharmaceutical binders for safe and consistent capsule formulation.

Possible Side Effects

  • Temporary lethargy or reduced activity in sensitive species
  • Not safe for use with invertebrates like shrimp or snails

Precautions & Storage

  • Remove carbon filters during treatment
  • Monitor ammonia, nitrite, and nitrate levels during use
  • Not intended for fish used for human consumption
  • Store between 59°F and 86°F in a dry, shaded location
  • Keep container sealed tightly and away from children or pets

For full shipping terms, visit our Shipping Policy. For returns, see our Refund Policy.

FAQs – Fish Zole Metronidazole 250mg Capsules

  • What does Fish Zole treat?
    Fish Zole is used to treat protozoan parasites and anaerobic bacterial infections, including Hexamita, Ich, Costia, gill flukes, and internal bacterial conditions.
  • How does Metronidazole work?
    It interferes with DNA synthesis in parasites and anaerobic bacteria, stopping them from replicating and eliminating infection at its root.
  • Is it safe for all fish?
    Yes, when dosed properly. However, sensitive fish should be monitored. Invertebrates should be removed during treatment.
  • Can Fish Zole be used for prevention?
    No. This is a treatment—not a preventative—and should only be used when symptoms are present or confirmed.
  • Can I use it during quarantine?
    Yes. It is ideal for treating new fish showing signs of internal or external infections during the quarantine process.
  • How soon will results appear?
    Most users report visible improvement within 3 to 5 days. Fish typically regain color, appetite, and activity.
  • Will Fish Zole harm the tank’s good bacteria?
    No. It selectively targets anaerobic bacteria and protozoa, preserving your biofilter.
  • Can I combine it with other meds?
    Only under veterinary guidance. Unsupervised mixing of medications can reduce effectiveness or create toxic combinations.
  • How do I dispose of leftover capsules?
    Follow local guidelines. Do not flush or dispose of in water systems.
  • How should I store the product?
    Keep in a sealed container in a dry place at 59°F–86°F, away from moisture and direct sunlight.

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.

Fish Zole Metronidazole Fish Antibiotics – 60 Tablets for Aquarium UseFish Zole 250mg Metronidazole Tablets for Protozoan & Bacterial InfectionsFish Zole for Hexamita, Hole-in-the-Head, and Fin Rot in Aquarium Fish