I'm not to to owning a pool...just new to doing it right as far as checking this and that. My test reflects my neglect and lack of knowledge on pool care. I just switched to a Chem-less copper ionizer need a plan to get this right.
23750 gals vinyl liner and sand filter.
I know I have to drain my pool to get the cya levels down. I see it would be cost effective to do that first before trying to add all the other stuff just to have it pumped out. After getting the cya down what would be the next move and so on?