Hey guys, this is my third year with a fiver glass pool first year was open and closed by the installer 2nd I opened it by emptying the whole pool and pressure washing it all and I proceeded to put chlorine to shock it and after a few days I dumped my salt bags. Was a great year no problem.
Now this year my 3rd, I did the same thing but on the pool wall there was sand paper like green substance which I thought was algae. I tried brushing but it would not come off completely the only way was with my pressure washer up close an inch at a time. This was time consuming so I told myself that if I super chlorinate and then throw algaecide it would do the trick. I guess I was wrong it's been 6 days and still it's there but the water is clear. I attached a picture I took from the top.
I was thinking of emptying the whole pool at pressure washing it all inch by inch but before I do that I've seen this forum help a lot of people so I figured I would give it a shot.
Tks for the help.