I have been running my pool for 3 days straight now and can not get my PH to rise. It was at 7.4 last week and I lowered it to 7.2 with muriatic acid. I am trying to lower my TA which is currently at 140. But I can't get my ph to rise so I can add another dose of acid. I am currently using a salt water system and it is on at the same time as the flows.
Here are some pictures of what I have running. Two returns both with 90 degree tees and one running a foutain and the other just a hard drop. See pix.
Any help or thoughts would be appreciated. I also tried running my compressor for 6 hours on 30 psi hooked to a drip hose weighted at the bottom of the pool