I'm also having high PH. Its hard for me to tell for sure but I think its higher than 7.8. I tried MA but only put about 1/2 of what the acid demand chart said. I like to do things slowly and make sure. Alk 90, CYA 38, PH 78 +?, total chlorine 4. I have used only bleach for chlorinating for years now, but someone gave me 2 gallons of a liquid pool chlorine and I used some of that when I opened the pool. Wondering if that raised my PH???