Hello, I have a question about high PH levels in my pool. I have a 18 ft circular Pool (7600 gallons) and a Intex 3,000 GPH Sand filter. About 3 weeks ago I got back from a work trip and my pool was green. I did the SLAM process and now it's nice and blue again. There is still algae hanging around on the floor of the pool but I've been able to brush and vacuum for the most part.
My issue now is that my PH/TA is really high. When I tested last night (using Taylor k-2006) my PH was above 9 and my TA was at 440. I looked at the PoolMath calculator and when I put in 9 with a goal of 7.5 for PH and then put in 440 with a goal of 100 for TA it asks me to put in 103 oz of Muriatic acid. However, if I bump my current PH up to 10 it asks me to put in 332 of muriatic acid which is significantly more.
I'm wondering what would be a good amount of muriatic acid to put in?
My current FC level is 2 (I know I have to get this up a little) and my CYA level is probably around 20 (I'm in the process of raising this to 40).
Thanks for the help!