Skip header
Free Shipping Over $49
My ProfileMy OrdersMy AutoShipMy RxMy PetsMy VetsMy RewardsSign In

Fish Zole (Metronidazole)

4.86 out of 5 stars
This Item Ships FREE!

Please confirm

This item is already on your autoship schedule! Are you sure you want to add it again?

Product Overview

How To Use

What’s in it?


Questions & Answers

Product Description

Fish Zole uses metronidazole to control "Angle Problems" and "Hole-in-the-Head" in Discus and Cichlid.

Who is Fish Zole (Metronidazole) for?

For use in aquarium or ornamental fish (freshwater and saltwater).

Why use Fish Zole (Metronidazole)?

Features of Fish Zole:
  • Bactericidal against gram-positive bacteria and certain types of gram-negative bacteria
  • Treats common diseases associated with bacteria in aquarium fish
  • Non-prescription
  • Available as a powder or a tablet
  • Safe for saltwater or freshwater fish

How does Fish Zole (Metronidazole) work?

This antibiotic is bactericidal against gram-positive, certain gram-negative, and anaerobic bacteria.


Thomas Laboratories

Active ingredient(s):


How is Fish Zole (Metronidazole) sold?

Available in tablet bottles of 30, 60, or 100 in 250 mg or 500 mg strengths.

What are the side effects of Fish Zole (Metronidazole)?

No known side effects.

What special precautions are there?

  • Only use for ornamental organisms and fish. Never use in fish intended for food use.
  • Only use in aquariums.
  • Keep away from children.

What to do if overdose?

Contact your closest emergency animal hospital.

How can I store Fish Zole (Metronidazole)?

Keep lid tightly fastened and store at room temperature between 59°-86°F. (15°-30°C).

Helpful Tips:

Fish Zole controls many common bacterial diseases in fish, including mycobacterial group (chondrococcus and gill diseases), Pseudomonas genera, and Aeromonas.


Add one tablet (250 mg) into aquarium for each 10 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While treatment duration depends on type and severity of the infection, it is recommended that extended medication baths continue for a minimum of 5 days and not more than 10 days. Discontinue treatment with this medication if no improvement is noted within 5 days. To remove harmless yellow color, change 20% of water and use charcoal filter until clear.

Main Ingredients


Write a Review

Fish Zole (Metronidazole)

Customer Submitted Questions

Is zole for fish equal to metronidazole for dogs?

1 Answer
Ask a New Question

Don’t know something or can’t find the information you are looking for? Ask us a question!

*Required Fields
We will ONLY use your email to notify you in regards to your submission.Privacy StatementQuestions & answers are typically posted within 24 hours, pending approval.