so this year during about a two week period after I opened the pool, my SWG cell died and i had it replaced. during that period i was just dropping chlorine tabs into my skimmer, and the mineral level was around 1700.
so also during this time a brown-ish tinted color started to appear around the upper foot along the walls and some on the floor (the pool is in-ground plaster).
The water is now fully mineral-ed (3100) and the last time i tested it all the levels were within normal ranges...and frankly the brown color has not gotten any worse.
So my question is, what is that and how do i get rid of it? is it "scale"? I have some de-scaler i can add to the water, but i just want to make sure that is really what it is first before i go dumping more chemicals in there. I don't believe it's algae because i really cannot scrub it off with the metal brush at all...
I should also note that in the hot-tub section of the pool, where the water is being circulated by jets constantly, all of the "scale" that was there early in the pool opening time is gone and it looks perfect...
any insight is appreciated!