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🐠 Transform your tank’s health with the power of live bacteria—fast, reliable, and effortless!
FritzZyme 7 delivers live, freshwater-specific nitrifying bacteria that rapidly reduce toxic ammonia and nitrite, accelerating aquarium cycling and stabilizing biofilters. With over 30 years of proven expertise, this 32-ounce liquid formula works in fresh and brackish water, requires no refrigeration, and maintains potency for one year, making it the go-to solution for professional and home aquarists seeking healthier, safer aquatic environments.









| ASIN | B0002DGKBI |
| Allergen Information | Fish Free |
| Best Sellers Rank | 57,544 in Pet Supplies ( See Top 100 in Pet Supplies ) 654 in Aquarium Water Treatments |
| Brand Name | Fritz |
| Country Of Origin | USA |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,193) |
| Global Trade Identification Number | 00080531802106 |
| Item Form | Liquid |
| Item Type Name | Fritz Aquatics 80210 FritzZyme 7 Nitrifying Bacteria for Fresh Water Aquariums, 32-Ounce |
| Item Weight | 0.3 Ounces |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Fritz Aquatics |
| Manufacturer Part Number | 80210 |
| Model Number | 80210 |
| Target Species | Fish |
| UPC | 080531802106 |
| Unit Count | 1 Count |
M**Y
Beat on the market to instantly cycle tanks
Brilliant
F**A
Absolutely Rubbish!
Absolutely rubbish, please don’t buy this…buy gloop instead for the live bacteria…these don’t work.
M**O
Can't report any favourable change to the cycling of my ...
Can't report any favourable change to the cycling of my 120 litre greenhouse aquaponics set-up. May have been due to shipping. Are the bottles exposed to extremes of heat during transport that could destroy the bug population in the soup?
C**A
I’ve used this on my tanks and friends’ tanks with struggling eco systems, it is WORTH IT! Soon after adding it, you start seeing the micro organisms responsible for keeping your water clean and your filter working well. I would recommend this to any aquarist as a basic need.👍
J**E
I emailed Fritz about some quries and their response was prompt and friendly. been using these for tanks and i do not need to add any salts or whatever. Fzz7 will stink like old eggs and a bit brownish but it is normal, not spoiled. Fritzguard is bluish and dun need it as much as Fzz7. Keep them normally in cabinet and use them every water change. Instructions are clear..
L**S
El producto llegó caducado.
T**G
I tried quite a no of other bacteria for my fish tank and found this to be the most effective. Only a small amount is needed for a stabilised tank.
A**R
Al parecer este producto es muy bueno y cumple con lo que se describe en la página y en las revisiones que se hacen de él, sin embargo lastimosamente llegó a mi casa con la fecha de caducidad expirada hace un año. Si se vuelve a plublicar, seguro lo compro.
Trustpilot
5 days ago
3 weeks ago