• Rapidly Eliminates Toxic Ammonia and Nitrite
  • Allows Safe Immediate Introduction of Livestock
  • Prevents "New Tank Syndrome"
  • Establishes and Maintains a Healthy Biofilter
  • Prevents Fish Loss
  • A Safe, Natural Approach to Water Treatment

FritzZyme® 7 contains specific strains of live nitrifying bacteria proven to reduce fish loss due to toxic levels of ammonia and nitrite. Nitrifying bacteria can take weeks to naturally establish colonies in new aquariums while ammonia and nitrite can reach lethal levels in only a few days. FritzZyme 7 provides the proper balance of bacteria proven to rapidly seed biofilters, greatly reducing the natural cycle time allowing for safe, immediate addition of livestock.

Fritz Industries was the first company to pioneer commercial-scale cultivation of nitrifying bacteria, and has remained one of only a few in the world with continuous production for over 30 years. FritzZyme 7 may be added to new tanks or established systems any time the biofilter needs fortification including; after water changes, aggressive cleaning, adding new livestock, medicating, or changing filter media. FritzZyme 7 contains live freshwater-specific species of nitrifying bacteria



FritzZyme 7 Freshwater

1 gallon

Treats up to 640 Gallons

UV sterilizers must be turned off prior to use and remain off for four days after applying FritzZyme 7 & 9.

Do Not Need to Refridgerate





Nitrifying Bacteria Specifications


Targeted Action Nitrification
Nitrification ≥1000mg NH2 liter/hour
NH4N oxidation rate with a balanced population of nitrobacter
Stability Up to 3 months (refrigerated)
Effective pH Range 6.5 - 8.5
Effective Temperature Range 50° - 110°F / 15° - 50°C
Typical Properties Appearance: Turbid Pinkish Brown Liquid
Fragrance: Slightly Musty
Form: Liquid
pH: 7.8 - 8.6
Approximate Salt Tolerance 100% @ 0ppt
92% @ 15 ppt
44% @ 25ppt
11% @ 35ppt
True saltwater nitrifiers are also available, call for details.
Packaging 1 Gallon (3.78 L / 8.4lbs) jug
4.5L (10lb) jug