I actually had previously hired a larger Pool Company to do maintenance on my pool every other week. After the second attempt to get them to vacuum the pool which I paid for I gave up on them and gave prell a shot. He visited my house today and did everything he promised to do. He adjusted the pH to adjust the alkalinity and then he fully vacuumed and scrubbed my entire pool and explained exactly what he did and what he would recommend I do until his next visit. He was very considerate and thoughtful and will continue to be used by me in the future. Thank you