Hello guys, need some help. I just got my new pool installed. It was filled with water about a week ago. Immediately after filling with water I noticed 3 problems. One was a "bare spot" on one of the steps where you can only see plaster and no pebble. The second is similar bare spots on the jacuzzi step, but the glue that holds the tile down is showing instead of plaster. The third is the one that's concerning me the most, the pebble underneath the drain caps (I think that is what they are called) is stained. This is because the water was dripping out of the pipes while the pebble was being acid washed. So is there any way to remove these stains? The pool guy said you can't help that because the pipes are pressurized with water and then leaked once they are cut open. I don't believe that there is no way to prevent this. Any insight would be very helpful.