FritzZyme 7 Freshwater 946ml$50.00
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Product information
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FritzZyme 7 Freshwater 946ml live nitrifying bacteria to cycle and stabilize freshwater aquariums. Fast, safe, and trusted by aquarists!
FritzZyme 7 Freshwater 946ml – Live Nitrifying Bacteria for Freshwater Aquariums
- Rapid cycling: Instantly introduces beneficial bacteria to new or existing tanks.
- Reduces ammonia and nitrite: Keeps toxic levels in check for healthier fish.
- Safe and natural: 100% live bacteria—no chemicals or preservatives.
- Easy to use: Simple dosing for all freshwater aquariums, including planted and community tanks.
- Trusted by aquarists: Proven results for cycling, water changes, and after medication.
Directions & Dosage
For new systems, dose 4 oz (119 mL / ½ cup) per 10 US gallons (38 L). For established systems, use 1 oz (30 mL) per 10 US gallons (38 L). For a large livestock system or systems with heavy bioload, new system dosage may be safely increased up to 10x.
Need help? Try our FritzZyme user guide!
- For best results, maintain ideal water parameters noted below and use FritzZyme® 7 before the expiration date on the package
- All chlorine and chloramines must be removed from water before adding FritzZyme® 7
- Nitrifying bacteria require ammonia and nitrite to survive; in new systems introduce livestock or another ammonia source like Fishless Fuel to start cycling
- Maintain adequate water flow or aeration
- Discontinue use of skimmer and UV sterilizers for at least 5 days after application
- No contraindications: can be used with all of our other products and meds
- Safe for use with all species, including plants and invertebrates
- Safe to add directly into a tank with livestock present
- Will not color or cloud aquarium water
- Variations of odor and color between bottles is normal, a strong sulfur smell does not mean the bacteria are dead
- Do not freeze or overheat. Store in a cool, dark place
- Overdosed? Live nitrifying bacteria are very safe even if overdosed. Observe for any distress, perform small water changes if necessary
Ideal parameters for FritzZyme® 7 nitrifying bacteria:
Temperature: 77-86 F (25-30 C)
pH: 7.3-8.0; nitrification is completely inhibited below pH 6.0
Salinity: 0 - 6 ppt (1.000 to 1.0045 sg); active up to 15 ppt (1.011 sg)
Alkalinity (KH): minimum 4.5 dKH or 80.5 ppm KH
Phosphate: above 0 ppm
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Live fish are dispatched Monday–Wednesday. Live fish shipping excludes WA and TAS. Northern Territory livestock orders require permit and quarantine arrangements. Dry goods ship Monday–Friday. Click & Collect is available after notification.
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