I have been having trouble keeping my FC consistent. It keeps going to the low side at about 2 to 4 ppm. I am trying to keep it up at about 7 ppm. There is no sign of algae. Water is always crystal clear. Pool temp running between 80 and 85 with a few clear days and a lot of cloudy days. Pool is used by 4 people most of the week and by 7 or so on weekends. The pool is vacuumed and brushed every other day. My CYA was 30 or a bit less and so I thought I should bump that up to 50. I did the pool math and it said to add 32 ounces of stabilizer which I did. My ph shot up from 7.4 to darker than 8.0. Is this right? I will correct the PH but it has been remaining very consistent. Did I do something wrong?