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Fish Metronidazole 250 mg

Fish Metronidazole 250mg is an antiparasitic and antibacterial medication used to treat infections in ornamental fish caused by anaerobic bacteria and protozoa. It is commonly used to manage conditions such as Hexamita, Hole-in-the-Head disease, and other internal parasitic infections. Metronidazole works by disrupting the DNA of microorganisms, effectively stopping their growth. 

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SKU : Status : In Stock Coupon Code : FREE10
Created at : 09-04-2025
Author : Aston Carter
Updated at : 09-04-2025
Medically Reviewd By : Dr. Peter Hales

Fish Metronidazole 250mg is a trusted, broad-spectrum antibacterial and antiprotozoal medication formulated for use in ornamental aquarium fish. It is particularly effective in treating internal parasites and anaerobic bacterial infections, making it a top choice among aquarists for hard-to-detect, internal illnesses that don't respond to standard antibiotics.

Whether your fish are suffering from Hexamita (Hole-in-the-Head disease), intestinal parasites, or bacterial infections, Metronidazole helps restore their health quickly and effectively.

Commonly Treats:

  • Hexamita (Hole-in-the-Head Disease)

  • Intestinal parasites (flagellates like Giardia and Spironucleus)

  • Bacterial infections in the digestive tract

  • Columnaris (when used in combination treatments)

  • Secondary infections following parasite infestation

  • Foul-smelling, stringy, white feces (a common sign of internal infection)

How It Works:
Metronidazole disrupts the DNA synthesis of anaerobic bacteria and protozoa, stopping their reproduction and eliminating infection from the inside out. It is absorbed into the bloodstream, making it ideal for treating internal infections that external medications can't reach.

Key Features:

  • Each tablet contains 250mg of pure Metronidazole

  • Targets both anaerobic bacteria and protozoan parasites

  • Effective for internal and external infections

  • Safe for freshwater and saltwater aquariums

  • Fast-dissolving tablet for easy administration

  • Ideal for quarantine or hospital tank use

Dosage & Directions:

  • 1 tablet (250mg) per 10 gallons of aquarium water

  • Dissolve directly in water or use as a medicated food soak

  • Treat once daily for 5–7 days

  • Perform daily 25–30% water changes during treatment

  • Remove activated carbon from filters during use

Optional Use in Medicated Food:

  • Crush tablet and mix with a small amount of fish food and garlic juice or fish-safe binder

  • Feed medicated food once daily for 5 days for targeted internal treatment

Precautions:

  • For aquarium use only – not for human or veterinary use

  • Not for fish intended for food

  • Store in a cool, dry place, out of direct sunlight

  • Keep out of reach of children and pets

  • Discontinue use if fish show signs of distress

Why Choose Fish Metronidazole 250mg?
Fish Metronidazole 250mg is a go-to solution for treating internal infections and parasitic infestations that can silently devastate your aquarium. It's safe, fast-acting, and a must-have for any serious aquarist looking to maintain a healthy aquatic environment.

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What is Fish Metronidazole?

Fish Metronidazole is an antiprotozoal and anaerobic antibacterial medication used to treat internal and external infections in ornamental fish caused by parasites and anaerobic bacteria.


What does it treat in fish?

Fish Metronidazole is effective against: Hole-in-the-head disease (Hexamita) Gill and intestinal parasites (e.g., Spironucleus, Hexamita) Bacterial infections in low-oxygen environments Bloat in cichlids Flagellate protozoan infections Pop-eye (when caused by anaerobic bacteria)


Can I crush the tablet for better dosing?

Yes. Crushing the tablet helps it dissolve into the water or mix evenly into food, improving effectiveness.


Should I remove chemical filtration media?

Yes — remove carbon, Purigen, or other chemical media before dosing, as they can absorb the medication and reduce its effectiveness.


Is it safe for all fish?

Use caution or avoid use with: Sensitive invertebrates (shrimp, snails, etc.) Delicate species like small tetras or fry


Does it harm beneficial bacteria in the tank?

Unlike many antibiotics, Metronidazole is gentler on nitrifying bacteria. However, if used in high doses or with other antibiotics, it can still disrupt the nitrogen cycle — so monitor water parameters during treatment.


Can I combine it with other fish medications?

Yes, Metronidazole is often safely combined with: Praziquantel (for mixed parasite infections) Kanamycin (for severe internal infections) Still, always research combinations or consult an expert before mixing meds.


Can humans use Fish Metronidazole?

No. Even if it contains the same active ingredient, fish-grade metronidazole is not approved for human use and may lack quality control, purity, and proper storage conditions.


How should I store it?

Keep in a cool, dry place Store away from sunlight and moisture Keep tightly sealed and out of reach of children or pets


Disclaimer: The content on this page is meant for informational purposes and is not, under any circumstances, supposed to be treated as a substitute for any medical advice, diagnosis, or treatment. For any questions that you may have regarding a medical condition, it is advised to consult your physician or seek help from a qualified health provider before self-medicating. In case you have any concerns regarding the content on our website, please write to us at info@usmedilife.com

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