Fritz Aquatics AFA80210 Fritzzyme 7-Freshwater Nitrifying Bacteria (2 Pack, 32-Ounce): Boost Aquarium Health and Balance Water Chemistry Review

If you're new to the hobby, you need it! These are the best beneficial bacteria at the best price. Use immediately after changing the water and before adding new fish to the aquarium.

Might smell awful. However, it helps to quickly level the tank. If you don't have media to take from another recirculation tank, this will definitely help. If your cycle breaks, this will help get it back faster than waiting.

If you follow the instructions it works amazing. I didn't buy enough the first time, so it took about 4 days for the tank to empty half of the recommended dose. Just did it again with the right amount and had no signs of "refueling syndrome". FOLLOW THE INSTRUCTIONS! I will buy as long as there are aquariums.

Fritz 7 is a great product, works great with all my aquarium volumes, it's a reasonable price, easy to follow instructions but most of it info on all Frits water treatment products I learned from the master. Aquarium Co Op breeder and read more about all the Frits products love how my aquariums respond it is very useful and valuable this quality is available from Revain thank you for looking after and supplying this brand. Sincerely, Robert T.

I finally realized my mistake. I bought a new 150l. basin and uses another product with low doses of nitrifying bacteria. The ammonia content changed over the course of several weeks. Then I found that FritzZyme had enough strains and significantly higher concentrations of live bacteria to fill my large biofilter. I tried it and the biofilter worked in days not weeks! This is the product we must use. Attention, switch off the UV filter and completely dechlorinate according to the instructions!