O-ACE-sis Liquid Clarifier 1 qt. (Pack of 12)The most important thing you can do to simplify the maintenance of a pool or spa is use Natural Clarifier every week. This is the only clarifier that works with the natural power of Chitosan. That's why we can assure it works better than all others. Its special, environmentally friendly chemistry removes more organic material than any other clarifier and extends the life of your filter. You'll also minimize consumption of more costly chemicals. UPC: