Hello, just joined, as a result of extremely high CYA levels.
Been scouring the net and am really not happy with what the pool shop has been telling me!
They have been recommending adding trichlor, among other things, even when the CYA level is at 184.
I think they might be just incompetent, rather than just selling chemicals. (I hope anyway!)
I am looking forward to doing the pool school and getting the low down on CYA.
Think I'll be draining some water soon though!