Hello, been a homeowner with a pool for about a year. Promised my spouse I would do all the pool chemicals, but he used to work for a pool chlorinating business so I thought his advice would be all we needed. Well, midway into summer our CYA was all the way at 200 (in sunny AZ they recommend 70). Pool store guy just said to backwash everyday for a couple weeks. Started using bleach only and all that backwashing got it down to 120. Except now a month later it went back up to 150. How is that possible if I haven't even added anything with stabilizer in it? Also, never had a problem with pH before, was always around 7.5 but now my pH seems to be rising, (7.8) not sure if thats a side effect of bleach or what. The pool store tells me what they're mostly concerned with is our phosphates (500). I have avoided a partial drain because water waste in the desert breaks my heart, but is it necessary? And if I need to partial drain how do I even do that? Also, its coming up on end of swim season, probably only 2 or 3 weeks left of swimming this year, so when should I do it, if thats what is needed?