Anthony & Sylvan put our pool in years ago and we've had them for opening, closing and maintenance of the pool. And then I purchased a chemical from one of their stores. Last year, when the pool was closed, we knew there was something wrong. It had been two weeks and it hadn't been making chlorine out of the salt system. They said that they would deal with it when it's opened. Opening came and they came, looked at it, took some things and got them replaced, but that didn't do it. They called someone and they discovered it was something else that needed replacement. They didn't have it with them. And so, it was a good two weeks later before I finally got an appointment to have someone come and replace it so my pool would be operating correctly