My previous service that I used from Angie's List, was terrible. After being with him for a year, I realized he wasn't knowledgeable at all. A friend of mine directed me to Sac Valley Pool Service. On the first visit out here, Miguel checked everything and noticed my 4 filters were solid gunk! It's was a miracle that serious damage wasn't done to my system. The previous guy never cleaned my filters in the entire year he was "servicing" my pool. Thank you Sac Valley!