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Fish metronidazole 250 mg – Fix Zole fish treatment, 60-count bottle
Fish metronidazole 500 mg – Fix Zole fish treatment, 60-count bottle

Fish Zole (Fix Zole) Metronidazole 500mg & 250mg Fish Antibacterial

Price range: $41.99 through $59.99
In stock

Fix Zole by Aqua Soma Labs contains metronidazole and is labeled for treating anaerobic bacteria and protozoa such as Hexamita (hole-in-the-head) in ornamental freshwater and saltwater fish.

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Description

Fix Zole – Metronidazole for aquarium fish

Fix Zole by Aqua Soma Labs contains metronidazole and is labeled for treating anaerobic bacteria and protozoa such as Hexamita (hole-in-the-head) in ornamental freshwater and saltwater fish.

Available as: 250-mg (60 Count), 500-mg (60 Count).

Before you treat

  • Follow the dosing directions printed on the bottle label.
  • Treat in a separate hospital or quarantine tank where possible.
  • Remove activated carbon from the filter during treatment and keep up regular water changes.
  • Complete the full course, even if fish look better sooner.

For ornamental aquarium fish only. Use in pet birds only under a veterinarian’s direction. Not for human use and not for food-producing animals. Keep out of reach of children.

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Fix Zole questions

What is Fix Zole used for?

Fix Zole contains metronidazole. Its label lists it for anaerobic bacteria and protozoa such as Hexamita (hole-in-the-head) in ornamental freshwater and saltwater aquarium fish.

How do I know my fish needs an antibiotic?

Test the water first (ammonia, nitrite, nitrate and temperature): many symptoms come from water quality, parasites or fungus rather than bacteria. Our guide How to choose an aquarium antibiotic explains the signs.

How do I use it?

Follow the dosing directions on the product label. Treat in a separate hospital tank where possible, remove activated carbon from the filter during treatment, and finish the full course.

Can I combine it with other medications?

Don’t combine different antibiotics or other medications in the same tank unless the product labels or an aquatic veterinarian say it’s safe.

Can people or food animals use it?

No. It is sold for ornamental aquarium fish only. It is not for human use and not for fish or animals raised for food.

Last reviewed: November 2026

Additional information

Weight N/A
Strength & Count

250-mg (60 Count), 500-mg (60 Count)

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