Every time I read a new thread I think I've found another way that I've been had by a pool store. 2 years ago I bought into a product called "Optimizer", that I paid about a $180 to treat my pool. It was supposed to make my water "feel" better and increase the pool's ability to fight off algae. It did feel better, but I've had algae problems every since. Don't tell me I paid $180 for $15 worth of water conditioner salt.