Fritzzyme #7 Freshwater 8 oz.

SKU: FTZ 80207
  • The ORIGINAL LIVE Nitrifying Bacteria
  • 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 – FritzZyme Saves Lives!
  • 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.


Preferences of Nitrifying Bacteria

  • Medication & Nitrifying Bacteria
    Nitrifying Bacteria are gram (-) rods up to 2 microns long; most pathogens are also gram (-). Most antibiotics equally effect both nitrifiers and pathogens. Other inhibitory chemicals include: formalin, formaldehyde, chlorine, chloramine, malachite green, methylene blue, acriflavine, disinfectants (ex: Windex™), copper (at 0.20 mg/L or higher), potassium permanganate and chloraquin. Always perform a 30% water change and add fresh FRITZ CARBON after using any of these chemicals to assure residual by-products have been removed. Then add FritzZyme™ Nitrifying Bacteria products to re-introduce nitrifiers.
  • Chemical Ammonia Removers & Nitrifiers
    Ammonia Removers must be examined on a case-by-case basis, since different formulations pose different risks. Avoid any containing formalin- whether you are cycling or not. Formalin (a form of formaldehyde) is inhibitory to nitrifiers already established in the filter, as well as those contained in both FRITZZYME and TURBO START. Many ammonia removers drop pH; others are loaded with phosphates. If your tap water contains chloramine (chlorine bonded to ammonia), you should use FritzGuard and follow with the immediate addition of Fritz A.C.C.R. (Chlorine, Chloramine & Ammonia Remover).
  • UV Sterilizers, Protein Skimmers & Ozone Generators
    Nitrifiers prefer to remain attached in the filter after the initial inoculation, which takes approximately 5 days depending on temperatures. Until attached, the bacteria are in danger of being removed via mechanical/chemical filtration equipment. Turn off UV Sterilizers, Ozone Generators, Protein Skimmers & remove sub-micron mechanical filter media (5 microns or less) before adding bacteria. Allow 5 days before turning them back on.
  • Temperature & Salinity
    It is best practice to cycle all systems within the optimal range of 77-86°F. After cycling, cold water tanks can be safely lowered slowly over several days. If systems cannot be cycled within this range, use double the standard dosage; in colder temperatures expect cycling to take slightly more time. Nitrobacter/Nitrococcus are more sensitive to low temperatures, thus cold water tanks are more likely to develop nitrite problems. Freshwater nitrifiers are tolerant of salinities (salt levels) of 0 – 20 PPT while saltwater nitrifiers prefer salinities ranging from 20 – 44 PPT.
  • pH & Alkalinity while cycling
    Due to the pH preferences of their nitrifying bacteria, fresh and saltwater systems differ in their tendencies to accumulate ammonia/nitrite. Marine hobbyists should pay particular attention to nitrite levels while cycling, and freshwater hobbyists should watch for ammonia. The stability of the pH is incredibly important to the bacteria. Through nitrification, a decrease in bicarbonates and an increase in carbon dioxide occurs, lowering the pH. If alkalinity is initially low, the pH swing can be large. Initial bicarb levels of 100-200 mg/L are desirable.
  • Dissolved Oxygen
    Below 2-3 mg/L Dissolved Oxygen (DO), nitrification won’t occur. Complete oxidation of ammonia requires 4.57 mg. oxygen per 1 mg. ammonia. For best results, D.O. levels should be above 80% saturation (at least 6 mg/L). Nitrobacter/Nitrococcus are very sensitive to low D.O. levels; at low D.O. levels, nitrite problems begin. Bio-filters often accumulate sludge, restricting flow though parts of the filter; this is called channeling. Channeling cultivates anaerobic bacteria, produces toxic compounds and inhibits nitrifiers. Frequently adding beneficial heterotrophic bacteria “tank-cleaners” as found in FritzZyme 360 Freshwater Aquarium Cleaner and FritzZyme 460 Saltwater Aquarium Cleaner will eliminate these pockets of sludge and prevent anaerobic areas in both the filter and gravel.
  • Odor & Appearance
    Nitrifiers have a slightly earthy smell and are rosy to dark brown in color. Batches vary slightly in color and odor. Neither color nor odor are indicative of viability of culture. Each batch is individually tested and must pass quality control before shipping. Always use before expiration date printed on bottle.