Biological Filter Starter A highly concentrated solution of beneficial bacteria that start up and maintain the biological filter in water gardens and koi ponds. Regular use of BioFilter Booster helps the biological filter remain active all season long. Reduces the build-up of toxic chemicals from fish waste, uneaten food and dead algae. Can be used in ponds containing salt.

8 oz - Treats 1,200 gallons
16 oz - Treats 2,400 gallons
32 oz - Treats 4,800 gallons