BIO-FILTER BOOSTER 8oz BIO-FILTER BOOSTER 8oz $5.25 SKU: AQP265A QTY: Click here to save 5% off of your order! BIO-FILTER BOOSTER 8-OZ 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. bottle treats up to 1,200 gallons