FRITZ AQUATICS Fritz Zyme 9 Saltwater Nitrifying Bacteria for Aquariums, 32-oz bottle -

Fritz Aquatics Fritz Zyme 9 Saltwater Nitrifying Bacteria for Aquariums

By Fritz Aquatics
Rated 3.3333 out of 5 stars

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$15.99Chewy Price

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About This Item


  • Formulated to immediately work to remove ammonia and nitrite with fast-acting nitrifying bacteria.
  • Made for saltwater tanks and reduces cycle time so you can add fish without having to wait.
  • The natural bacteria “move in” to your biofilters to establish colonies to keep your tank healthy, and won’t harm invertebrates.
  • Prevents new tank syndrome and can be used in established tanks, after water changes, adding medications or introducing new fish.
  • Available in 8-oz, 16-oz and 32-oz bottles to suit your needs and aquarium size.

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Questions & Answers

1 Customer Questions

How many gallons does the 32 oz do?
Answer by ChewyJan 24, 2022
For a new system, dose 4 ounces per 5 gallons. For a large livestock system, new system dosage may be safely increased up to 10x. For established systems, use 2 ounces per 5 gallons.

ReviewsWrite a Review

Rated 3.3333 out of 5 stars
3 Ratings
Would recommend to a friend

3 Customer Reviews

Rated 5 out of 5 stars
By Dakevbo on May 7, 2023

You Must Wait to Add Fish

Like all bacterial additives, you need an ammonia source. If you add fish to provide this source you are stressing your fish. Add pure ammonia or a piece of raw shrimp and then add Fritz 9. You will need to measure your ammonia and nitrite. Once they go down and you see a nitrate spike you can do a small water change and then add fish. This cycle takes at least a week. Fritz 9 only gives the nitrogen cycle a jump start.

Rated 1 out of 5 stars
By Fred on Nov 30, 2022

Do Not Add Fish Immediately

Directions State - Allows Safe Immediate Introduction of Livestock. I Added Fritz Zyme to a new aquarium fallowing directions. After 2 hours ammonia and nitrite were still to high to add fish. This possibly due to Fedex delivering a day late and allowing the bottle to freeze.

Rated 4 out of 5 stars
By Maee on Jan 31, 2022

It works well

It clears the bacteria but you have to use it every 5 days or so