For probably about 2 months our pool has been growing green algae along the walls under the waterline and in the grout of our tile. The water is clear. This is the 2nd summer we've had the pool and had no issues the first year.
As an initial attempt to solve the issue I had been brushing it weekly and increased FC by turning up the inline dispenser. I also did a simple shock once that had no effect. Several days after bushing the algae continues to return. Additionally, i'm having trouble keeping the FC very high with the inline dispenser.
After coming here for more and better information along with running all necessary tests, here are my tests and plan
CYA: 70-90 (the range is because had some issues thinking I was still seeing the dot)
CC: 0 (it was maybe a very faint bit of pink but has to be very close to 0)
I want to SLAM the pool but because of the high CYA I believe I need to solve that problem first. Since, our CH is very high as well I was thinking of draining the pool half way and filling with fresh water to lower the CYA and CH before beginning. After I get those lowered I will do a SLAM.
Does this plan seem viable?