Our plaster was done on Monday. By Monday afternoon a puddle had formed in a low spot in the deep end. It stayed there for about 24 hours until they came back to acid wash. The plaster guys said "it will go away" but from what I've read it looks like a hydration spot? I'm in florida and it's stonescapes tahoe blue mini pebble. What are some potential fixes if it doesn't go away when we brush and chemical the pool?