- Jun 10, 2011
- 9
Ive got a 20x40 inground vinyl pool that I have been opening myself the last couple years. I use the BBB method and evrntually always go from a green pool at opening to a sparkling pool. I am however still unclear of one thing. When my pool goes from green to a light blue, how long do i need to keep my chlorine levels up to shock level ? My chlorine is holding overnight and I dont seem to be using more than normal during the day. Do I keep at shock level until pool is completely clear or can I maintain normal chlorine level based on CYA at this point and just wait for the filter to do the remaining work ? Thanks