I agree that if it's exposed then they need to fix it correctly otherwise you'll have problems with it later down the road.
they are the white "scaling" leftover from not washing the cream off completely. there are four areas and they have stream bed water trails cut through them like how rivers leave trails in the desert.Bama Rambler said:As for the CYA I'd bump it up a bit. I aim for 2 ppm loss per day. If you do the math (yes there's math) if you save 1ppm per day that's 37oz of bleach you don't have to add, and over a 6 month swimming season that equates to 52 gallons of bleach you don't have to buy, and that's about $100.00 you don't have to spend. Figure about $10 for the additional CYA and you save $90 by bumping it up.
As for the stains. What type stains are they? Do you know?