I have no way of telling how high the CL is but I kept dumping in cl to keep it high for 3 days (before putting in 3.5 gallons each day of bleach it looked way darker than 5ppm). The water is clear and I put some 14 lbs. of dry acid in and have the TA down to 130ppm (put in 4 lbs. of borax to bring ph to 7.2). After the chlorine drops I will put in a little more and get it to about 100ppm.

Anyway, I noticed that the sides have a very light green granular looking growth over most of the pool and it won't scrub off. When I vacuum it looks like light green granular chlorine if that makes sense. Hopefully, it will decay and come off slowly. Any thoughts as to what this is and how I can remove it?

Greg