- 🦠 LIVE NITRIFYING BACTERIA: Contains freshwater-specific bacterial strains that help establish biological filtration and support the natural conversion of ammonia and nitrite.
- 🐟 SUPPORTS AQUARIUM CYCLING: Designed to seed biofilters in newly established aquariums and reinforce biological filtration in mature freshwater or brackish systems.
- 💧 USE AFTER SYSTEM CHANGES: Suitable after water changes, intensive cleaning, filter-media replacement, medication or the addition of new livestock when the biofilter may need extra support.
- 🌊 FRESHWATER & BRACKISH USE: Formulated specifically for freshwater and brackish aquariums. This FritzZyme 7 formula is not intended as a saltwater substitute unless the label expressly states otherwise.
- 📦 1-GALLON PROFESSIONAL SIZE: The 128 fl oz container is convenient for multiple aquariums, larger systems and ongoing maintenance. No refrigeration is required under the manufacturer’s recommended storage conditions.
Fritz Aquatics FritzZyme 7 Live Nitrifying Bacteria
FritzZyme 7 is a liquid aquarium treatment containing live, freshwater-specific nitrifying bacteria. These beneficial microorganisms help establish and reinforce the biological filtration responsible for processing ammonia and nitrite in an aquarium.
The selected 1-gallon container is suitable for aquarists maintaining large tanks, several aquariums or systems requiring repeated biofilter support.
Supporting the Aquarium Nitrogen Cycle
Fish waste, uneaten food and decomposing organic material release ammonia into aquarium water. In an established biological filter, beneficial bacteria convert ammonia into nitrite and then into nitrate.
A newly installed aquarium may not yet contain a sufficiently established bacterial population. FritzZyme 7 introduces live nitrifying bacteria to help seed the filter and support development of the biological cycle.
Ammonia and Nitrite Monitoring
FritzZyme 7 should be used alongside regular water testing. Adding bottled bacteria does not guarantee that ammonia and nitrite will immediately reach safe levels.
Continue testing with a reliable aquarium test kit and take appropriate action if readings rise. Do not add livestock solely according to elapsed time or product dosage; confirm suitable water parameters first.
Useful for New and Established Aquariums
Although commonly used during initial aquarium cycling, FritzZyme 7 can also support established systems after events that may reduce or disturb the biofilter.
Recommended situations described by the manufacturer include:
- Setting up a new freshwater aquarium
- Performing a substantial water change
- Completing aggressive aquarium or filter cleaning
- Replacing or changing filter media
- Adding new fish or other livestock
- Following the use of aquarium medication
- Reinforcing an established biological filter
Freshwater and Brackish Systems
FritzZyme 7 is formulated for freshwater-specific applications and is also listed for brackish systems. Use a product specifically formulated for saltwater aquariums when maintaining fully marine conditions.
Shelf-Stable Liquid Formula
The product is buffered for storage stability and does not require refrigeration when kept according to the current label instructions. The listing states a shelf life of up to one year.
Always check the printed expiration or best-before information on the received container. Do not rely on the general shelf-life statement if the label provides a different date.
How to Use FritzZyme 7
Application Instructions
Shake or handle the container as directed by the current product label. Add the specified quantity to the aquarium or filtration system based on the actual water volume and intended application.
The Amazon source instructs customers to follow the directions on the bottle and does not provide a complete dosage table. Therefore, dosage should not be estimated from third-party instructions.
Before Adding the Bacteria
- Calculate the aquarium’s actual water volume.
- Treat tap water with a suitable dechlorinator when necessary.
- Confirm that the product is within its stated shelf life.
- Follow the dosage printed on the current container.
- Maintain adequate water circulation and oxygenation.
- Avoid cleaning all biological filter media at the same time.
- Continue monitoring ammonia, nitrite, nitrate, pH and temperature.
Chlorine and chloramine can damage nitrifying bacteria. Prepare replacement water correctly before it reaches the aquarium and follow the directions of both the water conditioner and bacterial product.
Product Specifications
- Brand: Fritz Aquatics
- Product name: FritzZyme 7
- Product type: Live nitrifying bacteria aquarium treatment
- Selected size: 1 gallon
- Liquid volume: 128 fl oz
- Item form: Liquid
- Water type: Freshwater and brackish
- Primary purpose: Aquarium cycling and biofilter support
- Refrigeration required: No, when stored according to label directions
- Advertised shelf life: Up to one year
- Model number: 80223
- ASIN: B0002DGKCC
Storage and Handling
Recommended Storage
Keep the container securely closed and store it under the temperature and environmental conditions stated on the label. Protect it from freezing, excessive heat and prolonged direct sunlight.
Do not transfer the liquid into an unlabelled container. Keep the original label available so dosage, expiration and safety information can be checked before every application.
Aquarium Safety
- Use only as directed on the current product label.
- Never use the product as a substitute for routine water testing.
- Do not assume a new aquarium is fully cycled immediately after application.
- Avoid adding excessive livestock before confirming stable water parameters.
- Keep aquarium treatments away from children and household pets.
- Do not ingest the liquid.
- Wash hands after handling.
- Contact an aquatic veterinarian or experienced aquarium professional if fish show signs of severe stress.
FritzZyme 7 supports biological filtration, but aquarium results depend on water chemistry, temperature, oxygen, pH, stocking level, filter capacity and proper maintenance.
