Ok, so about 1.5 weeks ago, I started to notice some white flakes in one corner of the pool. There were only a few, so I ignored them. However, as the sun got stronger, I needed to increase my SWG output, and then I noticed that the flakes were now coming out of every return. They are paper thin, whitish flakes that are extremely brittle, and average 1/2 to 1 inch in rectangular shape.
The only changes over this period of time are: 1) I replaced the manifold for my Autopilot recently, and the acid feed is now going more directly into the center of the water stream, as opposed to just entering the side of the plumbing as it had been before. 2) My pool chemistry has remained fairly constant, except that around the same time as the flakes started to appear, I did raise my TA from 60 to 70 with baking soda. When my TA was 60 (and it had been there for at least 2-4 weeks), I hardly had any acid demand. Once I increased my TA to 70, there is a tendency for pH to rise to around 7.8, and my acid feeder has been going off fairly regularly. 3) increase in SWG output
Here are my current #'s
pH 7.7 <-- this is where my pH control is set to
Borates around 40-45
I raised the CH to >400 intentionally to partially compensate for the lower TA levels. What do you experts think is causing the flakes in my pool?