My pool was closed for 3 years (didn't live her before that). We just got it open with a new salt water system, pump and filter,, and I have no idea what to do with these stairs. The stairs are concrete but the pool is vinyl. The steps look to have been painted, but there is pitting in large areas and concrete is visible. Theb there is also splitting. The color has changed from white to brown on them in a month but no iron or other metals showing in the testing. PH is 8.2, CH is 91 and Alk is 129. FOC is .1 and CYA is 5. I have steps to rectify the chemistry. I'm hoping that may fix the stains...but who knows. We had one large crack and the pool epoxy was used. It is holding fine. Do we need to do that everywhere (dear lord)?