Waterbox Freshwater Starter Bacteria 500 mL

Waterbox Freshwater Starter Bacteria is a concentrated blend of beneficial nitrifying microbes that jump starts your aquarium's biological filtration. It rapidly colonizes filter media and substrate, converting toxic ammonia and nitrite into far less harmful nitrate for a safe, balanced home for your fish and plants. Reach for it on a brand new tank, after a large water change, or any time a treatment may have knocked back your bacteria. Keep the rest of your routine stocked from our full range of water care and conditioners.

Key Benefits

• Rapidly establishes biological filtration in new aquariums
• Converts toxic ammonia and nitrite into safer nitrate
• Reduces fish stress and loss during cycling
• Helps stabilize water quality after treatments or water changes
• Safe for all freshwater fish and planted aquariums

How to Use

Shake well before each use. Add 10 mL per 100 L (25 gal) daily during the first two weeks of cycling a new aquarium. Test regularly for ammonia and nitrite, and continue dosing until both read zero. Add a dose after water changes, filter cleanings, or medication to help keep your bacterial colony strong.

Specifications

Recommended Pairings

• Seachem Stability or FritzZyme TurboStart 700 for ongoing bacterial support
• Fritz Complete Water Conditioner to dechlorinate tap water before you dose
• Browse all freshwater supplies

Frequently Asked Questions

How long does it take to cycle my tank? Most freshwater tanks finish cycling in two to four weeks with daily dosing and regular testing. Warmer water and an established filter speed things up.

Can I add fish right away? Add fish slowly and lightly at first. Starter bacteria shortens the cycle, but stocking gradually keeps ammonia and nitrite from spiking faster than the colony can handle.

Do I refrigerate it? Store it at room temperature out of direct sun and use before the date on the bottle. Shake well before every dose.