Thanks for the help. I'm not too worried about the CYA levels, after ~10 years I know that ours seems to always be low. For whatever reason we struggle to keep it in the 30ppm range. We are on well water and it is close to liquid rock-maybe this has something to do with it. I found this site late last year and switched to BBB. The help I have found here exceeds any pool store I have ever been in, all they want to do is sell you something. I'll get the chlorine level up and keep it there, hope to see improvement soon. Thanks again.