I saw a post not to long ago (one that I actually posted to and was told not to hijack someone elses posts) that I can lower CYA and TA by using MA and aerating. I used 1 gal of Ma and aerated for apprx. 7hrs with a our cover pump and we always have our slide running, replaced about 36" of water and per my basic test, it lowered it to about 120-125 range. My CH is still high at 300 so my water feels hard, but looks ok. I have to fill it with well water. What suggestions, if any do you have? Thanks again for your help!