Sorry so long getting test results. I don't know how to test CC, but I have total chlorine and there is not chlorine smell coming from the pool. Today's readings are:

Total Chlorine 1.5
PH 7.5
TA 50
CYA 40
Total Hardness 180
TA 50

We have an aquarite SWG. If it is algea it is a very slow growing, only slippery in that one spot on the slope.

Thanks for your help

Webfeet