Bacteria-Pond Care Pond Care BioFilter Booster Highly concentrated solution of beneficial bacteria that start up and maintain the biological filter. Regular use helps the biofilter remain active all season. Treats up to 1200 gallons per 8 oz. BIO-FILTER BOOSTER 8oz BIO-FILTER BOOSTER 8oz $5.25 SKU: AQP265A Click here to save 5% off of your order! BIO-FILTER BOOSTER 16oz BIO-FILTER BOOSTER 16oz $8.25 SKU: AQP265B Click here to save 5% off of your order! BIO-FILTER BOOSTER 32-oz BIO-FILTER BOOSTER 32-oz $14.50 SKU: AQP265G Click here to save 5% off of your order!