Hi, This my second posting here . Trouble Free Pool has been a great help over the last few months. We were having too many problems with the original intex pump and sand filter including salt water generator. We moved up to a Hayward 1.5hp pump and 150 sq. ft. cartridge filter. What a difference. In the process of the change over algae moved in and took over. I'm not sure what to do? Do I need to drain the pool and get rid of the salt water? I would appreciate any help.