Hi, I'm totally new to owning a large pool. I have managed to keep the chemicals in balance but it seems like my autofill is constantly filling. Water bill for a month is $163 and it keeps climbing. I would like to either turn it off or replace it. I live in NV and evaporation is really high. I have my solar cover to help with that but I need to either fix or replace that auto fill. Can anyone tell me how to do either.