PRO Series® Pro Blend™ 20529PRO 55 gal Enzyme and Phosphate Remover. Regular pool maintenance is easy with PRO SERIES® Pro Blend. The outstanding benefits of our SMARTZyme® technology are combined with the industry’s premier phosphate removal technology. Pro Blend's naturally based enzymes will break down a variety of non-living waste in pool water such as sunscreens, lotion, hair products, pollen and more. This leads to a reduction in filter cleanings and superior water quality with less work.