I was reading your thread and although I am not knowledgeable enough to offer any insight directly to help with your problem, it did raise a question in my mind, and I hope I am not wrong in asking it here. Capshockeyfan has a problem with CYA levels being very high. I understand that you can maintain high levels of CYA as long as the chlorine levels are in somewhat of a proportionally high level. My question is this; Does CYA ever break down or go away through its normal chemical process or reaction with chlorine? Is it ever consumed? If so, how long does it take for CYA to break down and what chemicals does it break down into?