i have read that cyanuric acid is heavier than water so when you do a partial drain and refill to lower the levels you should:
1. turn off pump for a couple days
2. cyanuric acid will settle to bottom
3. partial drain from bottom of pool
i have also read that you should drain from the top. this does not makes sense since the acid should be heavier, but it was recommended at a pool stores website.
which method is correct?
does it really matter?
do i really need to have my pump off for a couple days?