Thanks Ted. My pool is an AG so I only have one return which could be even higher PH rise. Once I try the acid a little at a time I will look for a drop. If it does I will just have to keep it in check and if it rises with the SWCG I will bring it down again. My only question is I keep reading when I put in the Muratic Acid I have to aerate but with an AG pool how do I acheive this?