FritzZyme 7 Freshwater Nitrifying Bacteria

FritzZyme 7 – Live Freshwater Nitrifying Bacteria

FritzZyme 7 contains live, freshwater-tuned nitrifying bacteria that rapidly establish or replenish your aquarium’s biological filter. It’s ideal for new setups, post-maintenance recovery, livestock additions, and cycling assistance with no need for refrigeration.

Benefits & Features

• Seeds both ammonia (Nitrosomonas) and nitrite (Nitrobacter) bacteria—quickly reduces toxic ammonia and nitrite buildup
• Proven and widely used by hobbyists, public aquariums, and fish farms
• Shelf-stable for ~18 months at room temperature—no refrigeration needed
• Works safely in freshwater and brackish systems up to ~6 ppt salinity
• Safe for use with fish, inverts, plants, and alongside other treatments when dosed properly

Dosage Guidelines

• New tank setup: 4 oz (119 mL) per 10 US gal (38 L)
• Established systems: 2 oz (60 mL) per 10 US gal (38 L)
• High bioload or crash recovery: Dose up to 10× the new-tank rate safely
• Apply after dechlorination and avoid using UV or protein skimmers for 5–7 days post-dose

Available Sizes & Coverage

Usage Tips

• Shake well before use.
• Ensure dechlorination—chlorine and chloramines must be removed before dosing.
• Avoid UV sterilizers and protein skimmers for 5–7 days to allow bacteria to establish.
• Safe to add fish immediately in new tanks—bacteria will convert waste as it forms.
• Reapply during filter media changes, dose spikes, or after adding livestock.