Buyer Beware!!!
They don't check your chemical levels before dumping chemicals in. I have used them for about three years and my pool was never quite right-always blamed it on my well water. After my skin on my legs turned red two weeks ago (glad I didn't just jump in) I checked and my chlorine is dangerously high!! Now I have the choice of draining and risking a crack due to heat, or waiting until fall and not being able to swim. Never again....