We have be extremely disappointed by this company. I honestly hate giving bad reviews but it's the end of September and we are still struggling with algae and lack of service. They come unprepared and are constantly saying they will come back with the right equipment and yet it's almost a week later before they return. By then the situation as gotten to a point that it's going to take even more chemicals and money to fix. I bought a robotic cleaner which was probably the best thing I could have done. This has been more of a help then the hundreds of dollars I have spent on this company. This is truly a company that I will suggest not using!