I'm going to try the DE. I can't find it in the stores in my area (small towns). I could drive to Lincoln to get it but that's an hour and a half away, LOL! So I ordered it on Amazon. I'll start by adding about 1/8 of a cup of DE mixed in with pool water and watch the psi on the pump/filter. In the meantime, I keep vacuuming every evening but the water is still cloudy. It's a slow process. I'm still trying to get the chlorine up to shock level. I'm adding bleach and muriatic acid every night just before dark. The numbers this morning were: FC=22, CC=.5, CYA=120, PH=7.8. I hope I'm on the right track!