Can someone please help us. We have had a green and murky pool for about 3 wks. The pool store has sold us a ton of chemicals. Bottom line is that my husband shocked the pool 4 days ago with dichlor. We left town for a couple of days knowing that we were going to have to do something about the algae when we came back. After reading your forums and getting a CYA reading we drained 1/3 of the water yesterday and this morning I put 2 gallons of Clorox bleach in. Prior to the drainage our CYA was off the charts at 150. We just took more water and had it tested and it came back as CYA 150, FC 15, PH 8.1. The pool store tried to sell us more algaecide and were not concerned about the CYA level. What I don't understand is why the CYA has not gone down any with the drainage of the water.