After some research, I found out that all those thin white flakes in my pool, especially in the spa, are from scaling. Here are my test results from this morning:
FC = 5.2; CC = 0; pH = 7.6; TA = 110; CH = 800; CYA = 180
I know we have hard water but I haven't tested the tap. According to Pool Math, I should drain the pool about 56% and refill with fresh water. If I do this, in what order should I be balancing the chemicals with the new water in? Salt first, then what? And do I really need to drain the water, or can I just continue to lower the pH to 7.2 as suggested and aerate the water?
My test results were a little higher last week due to a pH of 8.0, but I added acid and dropped the pH so now the levels are lower.
Note: to be able to read the CYA, I diluted the test with 1/2 tap water as explained on the Taylor site when your readings are higher than 100 ppm.
Is it possible that the scaling is forming on the filter screens and I need to clean them out? I've never opened the filter myself.
What should be my plan of attack???
Other than the high TA, CYA, and CH, the water looks amazing.