Ok. I was thinking about going and dumping bunch of chlorine in tonight but not retesting tonight. I know that I’ll have chlorine lost overnight and I won’t be able to measure it but since I’m anticipating having a loss anyway I think I’m better off hitting that target don’t you think?No. As long as your FC is above the minimum level for your CYA, you are still killing algae. Just slower than if your FC is at SLAM level.