Hi! I’ve been stalking these forums for a while now, and appreciate all the knowledge and advice within this site. I have a question about plaster. We have pebble Tec Caribbean blue. A couple weeks after plastering and filling pool, we noticed a dark spot and streaking. The builder told us the pool needed to be drained and acid washed. We opted to wait for swim season to be over, so now they are draining and acid washing the plaster. Any thoughts on what might have caused this? And is this the right solution to fix? Attached is pic of plaster. Thanks!
Sorry to hear about your plaster woes. Unfortunately, many such scenarios comes-down to how the material was prepared and applied. Experts such as 
