FritzZyme® 7 – Live Nitrifying Bacteria for Freshwater Aquariums
FritzZyme® 7 jump-starts the nitrogen cycle in freshwater aquariums by introducing live, freshwater-specific nitrifying bacteria that rapidly reduce toxic ammonia and nitrite levels. Ideal for new tank setups, it significantly shortens cycling time, allowing for the safe, immediate addition of livestock and helping to prevent fish loss due to harmful water conditions.

Developed by Fritz Industries—the pioneers of commercial-scale nitrifying bacteria production—FritzZyme® 7 has over 30 years of proven reliability in aquarium and aquaculture systems. It’s perfect for use during initial cycling or anytime your biofilter needs support, including after water changes, filter media replacements, livestock additions, or medication treatments. Safe, effective, and easy to use, FritzZyme® 7 is trusted by professionals and hobbyists alike to maintain stable, healthy freshwater environments.