Recently my salt cell quit working because of too much scale build up. I was traveling when this happened and when I returned, 4 days later, the pool was neon green with algae. I immediately shocked it and ran it for 24 hours. I got the salt cell cleaned up and everything seemed good but it was too late... black algae all over the pool floor. I shocked and brushed for a week and nothing worked. The company that did the pebble sheen suggested I drain it and give it a straight chlorine bath. I followed their recommendations and drained, chlorine washed, and refilled in 2 days and the algae was gone. However, when I filled it back up I was left with stains everywhere similar to the photo. My pool builder and the finish contractor pretend like they dont know me and I dont know how to fix my staining issues. The water is balanced and back in good shape and the pool is working fine but the stains still exits. I am unable to load the photos (some error code). The staining looks like different shades of the pebble sheen's blue finish. The staining is darker blue than the other areas and appears to be coming from the infloor heads. I can email photos to anyone who may be able to help.