Fritz Aquatics Fritz Zyme 7 Freshwater Nitrifying Bacteria for Aquariums

By Fritz Aquatics
Rated 5 out of 5 stars
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$5.99Chewy Price

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About This Item

  • Formulated to immediately work to remove ammonia and nitrite with fast-acting nitrifying bacteria.
  • Made for freshwater 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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Top IngredientsN/AN/AN/AN/APurified Water, Proprietary Consortium Of Nitrifying Bacteria, including various strains of Nitrosomonas and Nitrospira....
Fish TypeTropical FreshwaterTropical Freshwater, Betta, Cichlid...Tropical Freshwater, Betta, Cichlid...Bottom Feeder, Tropical FreshwaterTropical Freshwater
Aquarium TypeFreshwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwaterFreshwater

Questions & Answers

3 Customer Questions


How many drops do you add to a 5 gallon tank?
Answer by ChewyMay 19, 2022
You would use 12 milliliters per gallon for an initial dose, or 6 milliliters per gallon for a maintenance dose.

Does this product come cold packed?
Answer by ChewyApr 01, 2018
The item does not arrive cold packed.

How much per Gallon of Aquarium water?
Answer by ChewyOct 13, 2021
For new systems, dose 4oz (119 ml / ½ cup) per 10 US gallons (38 L). For a large livestock system, new system dosage may be safely increased up to 10x. For established systems, use 2 oz (60 ml / ¼ cup) per 10 US gallons (38 L).

ReviewsWrite a Review

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7 Reviews
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7 Customer Reviews



Rated 5 out of 5 stars
By saphbettas on May 19, 2022

The Best Bottled Bacteria

My aquarium went unestablished for months, but only after using this product has the cycling process finally kickstarted! It works perfectly, and Chewy's customer service was also extremely quick and helpful. I'll definitely be purchasing again.


Rated 5 out of 5 stars
By PunkKin on Mar 24, 2022

Start up a tank and just add fish.....

This stuff is amazing. I tore down my tank due to red algae, cleaned tank, got all new stuff for the tank, just added this as directions recommend, and added my fish back to tank......2 weeks later they r still going strong!!


Rated 5 out of 5 stars
By Zach on Jan 21, 2022

The best Beneficial Bacteria there is

This is the best Beneficial Bacteria I've tried. I had a 60 Gallon tank that I tried to cycle using Tetra Safe Start Plus, and Stability. Both of which I had success with in the past, but no matter what the Tank wouldn't cycle. I bought FritzZyme 7 Nitrifying Bacteria after it was recommended to me that this was the only Beneficial Bacteria in a Bottle that had actual live Nitrifying Bacteria that would cycle my Tank. So I tried it, and my Tank cycled within a week. I am very happy with this product, and I would definitely recommend it.


Rated 5 out of 5 stars
By Happy on Jan 21, 2022

Well pleased

I order all of my products from chewy.. always well pleased with the fast shipping great prices.. amazing customer service. This stuff is great I would recommend this product for anyone who has a fish aquarium..


Rated 5 out of 5 stars
By Kizzi712 on Dec 8, 2021

The Very Best

It just doesn't get any better than Fritz! When trying to cycle a new tank Fritz actually has live beneficial bacteria. It creates a cycled tank much faster than any of the other brands. I was recommended this product t by Trafish Aquatics on YouTube. I'm so glad I have it as part of my dependable products. Indigo the Betta is very happy.


Rated 5 out of 5 stars
By PetOwner on Feb 1, 2022

Good Stuff

After using this once on a brand new tank I’m sold. The tank looks awesome and now I use this for every water change and livestock additions. Must have in my opinion.


Rated 5 out of 5 stars
By VRyan on Oct 25, 2021

Best Brand Ever

I started using this brand as a recommendation for KG Tropicals on Youtube and I must say I am highly pleased with this product. It works well, has easy dosage and lasts a lot longer than it's expensive cohorts.