I have high CYA (the TFT test kit confirms it at 100) and my chlorine level won;t go back to a normal range after two shocks to defeat algae. So I want to drain my pool by 1/3 and get the shemistry back to normal. Anything I whoul dbe aware of or careful of when I drain the pool? I am using two submersible pumps.
Thanks.
Thanks.