Please help. Im at a loss and not sure what to do. got the pool started this year after I had the cover fall in over the winter. Extremely dark green and a mess. I put shock in the pool and it cleared up a bit, but still cloudy. I can see the bottom of the low end and starting to see the mess of leaves on the deep end. But I felt the walls and they are like sandpaper I was told that it was because of calcium. how do I get it off?
I went to the local pool store and they tested
Hardness OVR 396ppm
Cyanuric Acid 1ppm
By the way, my pool is 20x40 inground pool