Split off of No Chlorine / Phosphates. JasonLion
I just saw your post, so by now you have probably solved the problem. However, if not let me say that phosphates can be a serious problem. A lot of these pool mavens dismiss it as as a non-issue, but depending on your region they can indeed be an issue. I am in southwest Florida, home of the phosphate mining capital and I regularly deal with them in the 80 pools that I service. Believe me that when you cannot keep chlorine in the pool and you have sufficient CYA, phosphates can be the problem. Dose the pool with a quart of remover (minimum), not 3 or 6 ounces, run filter 24 hours, clean the filter numerous times, and recheck level. Then dose pool with a remover of 3 ounzes every month to eliminate any growth.