Started a SLAM Saturday. Up to last night the water was green and I could barely see the bottom. This morning the green was gone and water was clear. I am adding Chlorine per the chart here based on the FC amount tested. So, I need to maintain 16 PPM based on my CYA. I tested just now and I do it twice per day and I'm down to 8PPM. The water looks good. I'm wondering what is consuming all the Chlorine? I'm not seeing algae anywhere. I cleaned the filters Sunday. Is it possible they need to be cleaned again?