I think I have annoyed my pool builder to the max already, albeit with real issues. But another issue cropped up on Saturday and I need to ask someone if I am over reacting. They came to fix some decking issues and the crew needed to wash out. The water from them cleaning their equipment behind the water feature was going through the dirt and leaking from one of the returns and pool light. Not a light drip either. Is it the pool interior that makes the shell water tight or should the shotcrete be fairly water tight on its own?