Quote Originally Posted by waterbear
Also the CYA, as it dissolves, can temporarily lower the pH. (It does it in my pool) It is acidic.
that must have been what did the trick!

anyway, my pool is really starting to look good again. I just need to keep brushing the walls and the floor and get the rest of the gunk out.

thanks for all your help. I will post some more current results tomorrow.