Hi all. I hope someone with knowledge of my question can help. I have green algae in my new resurfaced pool and I would like not having to slam my pool. In addition to my question above I noticed that my startup polyquat dose lowered my chlorine from 3 ppm to .5 ppm when I measured the results after 24 hours. I am confused after reading some polyquat posts on this forum as the explanations just raised more questions. Before giving the pool the startup dose of polyquat, the CYA level in the pool was 45ppm. I haven't yet tested it today but plan to tomorrow. I would like to keep the CYA level in my pool no higher than 50 ppm.....any help is greatly appreciated. John