Thanks again! The CYA part of the test kit seems to be working at least because the store tested the same. Good to know that that CYA level isn't that excessive for down south here then. It seems like right now the pool is using virtually no chlorine because the CYA is high, it's been cool out and the pool is partially shaded. It's only at about 5 ppm though and according to the best guess chart I guess that's a little low. Trying to decide if I should bump it up a couple ppm and just keep it there. The pool seems to be doing well right now but I figure a little more can't hurt.