Thanks for all the help. I do have well water, so I'm thinking I might have metals now, since I'm keeping the Chlorine around 15, vacuuming to waste, scrubbing, backwashing and I'm still not seeing any results. I did adjust the CYA about 4 days ago.

I'll take a water sample to a pool store tomorrow and see what they come up with on the metals. Hopefully I can get this straightened out soon.

Robin