To start off with, I messed up big time. I didnt cover my pool in the fall and we started with a frog pond, yes we had frogs. I didnt have the reagents to test my water and I never got by a pool store for them to test it. I started dumping bleach and plenty of it, got the water to a grey color for a short time, then it went green again. I thought surely I cant have any cya in the water so I dumped a 3 lb container in yesterday. I got some reagents today, my numbers were FC 20.5 CC 1.5 TC 22. PH 6.8 ALK 120 and the shocker, tested 2 times CYA 55-60. I stopped the pump and backwashed for 3+ minutes, I figure the CYA may still go up some? I havent added any bleach today so Im scared to think how high I got it yesterday. THe pump has been running 3 days straight 24/7 Im brushing and vaccuming 2 times a day. Water is still light green/ and very cloudy. Sorry for the long post, but just hoping to slowly see some improvement. We have a 24' above ground pool with 1.5 hp pump and 200 lb sand filter