Hello esteemed community,
I've been battling my pool this summer and finally got "most" of the stuff off the ground. However, I still have a substance that is sticking to the bottom of my pool liner that won't scrub off. The pool was kept for at least a week in the orange on my 5 way drip test. Phosphates tested at 100 before I began that step. Early this summer I had a lot of calcium build up on the walls and bottom and the whole pool has been scrubbed numerous times along with the scale remover added. The walls are no longer scaly to the touch like they used to be.
I'm trying to figure out what this stuff is so I can get whatever is needed to fight it. It's pretty much along the lower edge of the perimeter of the pool and a bit towards the middle. Most the perimeter though.
Any help would be greatly appreciated.