I'm a new pool owner so I apologize if this has already been posted else where. I have a new above ground doughboy pool 21' round. The pool is half in ground with half the pool being 6'2" deep and the other half is 4'. I'm having issues with maintaining my current PH. Here are my numbers. (Taylor test kit 2006)
FC: (measured at .2ppm) 2.2ppm
TA: 90-110ppm (no chemicals added, besides chlorine tested 2 days apart. We did get heavy rain)
CYA: not registering anything(solution not cloudy)
I do have hard plumbing with a Hayward CL200 chlorinator set to 4. I run my 1hp pump for 7 hours a day.(from 7:30pm-11pm, then again from 5am-8:30am off peak hours) based off some specs (85 GPM) I estimated I'm turning over the water approx. 2-3 times a day.
I have been having issues with my PH dropping from 7.4 to 7.0 over a course of a few days. I have added a PH plus and have got it back up to 7.4-7.5 with in 4 hours for it to drop again in a couple of days. My TA seems to be in range or should I push it up to 120ppm? Any help and advice would be great. The water is still pretty cold 67 degrees F (just filled up a week ago) but crystal clear.
Again thanks, this forum is awesome!!