Add weekly to maintain near zero phosphate levels Cleans waterline and filer SMARTZyme technology reduces frequency of filter cleaning and scrubbing scum lines The benefits of Pool Perfect and Phosfree combined Weekly dosage will improve water quality and reduce maintenance Natural Chemistry has developed a regular maintenance program to continually remove phosphates as they enter the water. The program works in conjunction with the enzyme-based Pool Perfect; combining the benefits of both products into an easy maintenance program for swimming pool owners.