My target #s are ~80 TA and ~7.2Ph.
I'm having to add about 1 gal. of 34% MA a week to keep the Ph/TA at these levels.
The pool was re-plastered in May, so I realize this will create a need to use more acid, but two things bother me. First, the amount of acid I'm having to add has not decreased at all since May and seems to have increased some. Second, prior to having the pool re-plastered I was still having to add (what I consider) quite a bit of acid at 1/2 gal a week. Is there something else that I should be looking at that would contribute to this rise in Ph/TA?
Also, I didn't add acid for 4 weeks and Ph was off the charts and TA was around 400 by the time I got back on track. My SWG element would get covered in the white toothpaste stuff after just a couple of days to the point it would essentially stop producing any measurable chlorine until I hosed it off. I thought my element needed to be replaced but now that I'm adding acid regularly it seems the buildup is back to normal. What is the white gunk that builds up on the element and why does it seem to be affected by Ph/TA?