I was spending over fifty dollars a month trying to keep my pool clean. No matter what I did it never seemed to stay clear and algae keep coming back on the walls of my pool. The local pool supply company, with a capital L, would test my water and sell me more chemicals. I had Oasis come by from a referral from a networking group to have my sand changed out of my filter. Hello! My pool has never been clearer. Thanks Shawn. He even changed the gasket that was leaking from my pump when he was out. A part he readily had available on his truck.