Aquarium Metronidazole 250mg & 500mg – 100 Fish Treatment Tablets
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Aquarium Metronidazole 250mg & 500mg – Fish Zole Treatment
Aquarium Metronidazole is a powerful antiprotozoal and antibacterial medication intended for ornamental aquarium fish. It is available in 250mg and higher-strength 500mg Forte options, with 100 tablets in every bottle.
Also commonly searched as Fish Metronidazole, Fish Zole, Fish Zole Forte and Aqua Zole, metronidazole is widely associated with susceptible internal protozoal infections and certain anaerobic bacterial infections affecting freshwater and marine ornamental fish.
Available Strengths
- Aquarium Metronidazole 250mg: 100 tablets
- Aquarium Metronidazole 500mg Forte: 100 tablets
Both options contain metronidazole as the active ingredient. Select the strength specified by the verified product directions or recommended by a licensed aquatic veterinarian.
Powerful Antiprotozoal and Antibacterial Activity
Metronidazole becomes active inside susceptible anaerobic organisms and disrupts essential cellular processes. This distinctive action makes it particularly relevant to certain flagellated protozoa and bacteria that thrive in environments with limited oxygen.
Unlike conventional broad-spectrum antibiotics, metronidazole has focused activity against susceptible protozoa and anaerobic bacteria. It does not treat every bacterial infection, external parasite or fungal disease.
Conditions Associated With Metronidazole Use
An aquatic veterinarian may select metronidazole when evaluating susceptible conditions associated with:
- Hexamita and Spironucleus-type flagellates
- Hole-in-the-head disease in cichlids
- Internal protozoal infections
- Intestinal flagellates in discus and angelfish
- White or stringy feces associated with internal disease
- Loss of appetite and progressive weight loss
- Abdominal swelling or wasting associated with susceptible organisms
- Susceptible anaerobic bacterial infections
- Secondary infections involving oxygen-poor damaged tissue
Common Signs of Internal Protozoal Disease
- White, pale or stringy feces
- Reduced appetite or refusal to eat
- Progressive weight loss despite feeding
- Darkened coloration or social withdrawal
- Abdominal swelling or a sunken abdomen
- Pitting or lesions around the head and lateral line
- Reduced activity and declining body condition
These symptoms are not exclusive to protozoal disease. Worms, poor nutrition, bacterial infections and water-quality problems can produce similar signs, making accurate diagnosis essential.
Product Specifications
- Product: Aquarium Metronidazole
- Also searched as: Fish Zole, Fish Zole Forte and Aqua Zole
- Active ingredient: Metronidazole
- Available strengths: 250mg and 500mg per tablet
- Package size: 100 tablets per bottle
- Medication class: Nitroimidazole antiprotozoal and antibacterial
- Target organisms: Susceptible protozoa and anaerobic bacteria
- Intended for: Ornamental aquarium fish
Professional Aquarium Treatment Practices
Whenever possible, isolate affected fish in a clean, well-aerated hospital or quarantine tank. Separation allows closer observation, accurate treatment-volume calculation and reduced medication exposure for healthy fish.
For internal conditions, an aquatic veterinarian may determine whether administration through aquarium water or properly prepared medicated food is more appropriate. Fish that continue eating may require a different administration method from fish that have completely stopped feeding.
Test ammonia, nitrite, nitrate, pH, temperature and dissolved oxygen before and throughout treatment. Activated carbon, UV sterilization and certain chemical filtration systems may remove or reduce aquarium medications. Adjust filtration only when required by the verified product directions.
Use Aquarium Metronidazole exactly as directed on the original product label or by a licensed aquatic veterinarian. The correct strength, administration method and treatment duration depend on the diagnosis, fish species, aquarium volume and water conditions.
Important Safety Information
- For ornamental aquarium fish only.
- Not for human consumption or human medical use.
- Not for use in fish intended for human consumption.
- Metronidazole does not treat every parasite, bacterial infection or fungal disease.
- Do not combine with other medications unless professionally directed.
- Keep out of reach of children and other animals.
- Store according to the instructions printed on the original label.
- Review all ingredients, warnings and directions before use.
Package contents: One bottle containing 100 Aquarium Metronidazole tablets in the selected 250mg or 500mg strength.
Your order of 50$ 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.






