POND BUILDER STARTER 16-oz CAREFREE ENZYMES: POND BUILDER STARTER 16-oz $11.50 SKU: CFE94400 QTY: Click here to save 5% off of your order! POND BUILDER STARTER 16-OZ When ponds are filled with fresh water, bacteria is rarely found Pond Builder Starter is a mix of natural, which will seed the bio filter.  Adding Pond Protector at the same time will kick start the bacteria to work more effectively in breaking down contaminants faster. Application: 16 oz. bottle treats 1,000-3,200 gallons.