NC 1L (33.9oz) Pool Magic + PhosFree Close your pool with Pool Magic and next spring youll enjoy Clear Perfect Water with half the time and work! We are not exaggerating when we say your spring opening will be hassle-free and take less time. no phosphate build-up provides fast easy start-up maintains phosphates low all season prevents waterline rings helps preserves pool liners & finishes great for end of pool season open clean, clear pool following season makes water feel soft & silky