This product is an amzing companion product. It increases the pool experience by helping break down the body oils, make ups and suntan lotions that enter the pool from our bathers. The first 1L bottle will charge your 40 000L pool with a 600ml dose, and provide another two weeks treatment. After that, each 1L treats your 40 000L pool for five weeks. Increased water clarity= increased bather experience. Further, when used as part of a three step weekly water management program, you will even notice less problems arising as the water is actually cleaner by using Natural Pool Enzyme. Use as directed, never mix chemicals. It is always a great season with Pool Profs in your backyard! Ask about how effective it can be in helping maintain your soft sided pool!