I need some assistance. My Pool is about two years old to the date. I have a quartz plaster saltwater pool and I have some discoloration in the plaster and some of the surfaces are very rough. They have been there since the pool was installed, but I thought at first that they would go away, but they have not. The more I read on here the more aggravated I get about them. What are my options to get it fixed. Attached are some photos. I am working on getting my chemistry up to par right now. My numbers are as follows: TC=4.5, CH=450 ppm, TA=70 and CYA= 23. I know my numbers are a bit off, but hope to have them under control shortly..