I am new to the forum and I don't know if I am posting in the correct place, but I need help. Algae has taken over, and after reading your article on turning my green swamp blue, I know that my CYA is far too high (117!!) It is eating chlorine by the hundreds of dollars. On your advice, I have set out to drain some of the water and refill with fresh water. The pool is 11 years old, inground and plaster. My problem at the moment is how to open the floor drains now that the hot tub is empty and the water is below the skimmer line. I have a Jandy valve in front of the pump and a manual valve to the side of it. The person who put in the equipment told me to just turn these two to different positions until the skimmers stopped pulling water and the hot tub drains stop and then the floor drains would kick in. I have tried every direction the valves will go, and I am at a loss. No water is draining and the pump is trying to pull like crazy. Sure could use some advice. No one here seems to know what to tell me. I can't begin to work on the water until I can lower the CYA. Thanks for any help!