I discovered a crack in the bottom of my skimmer housing. It extends about half-way around the suction opening. I've attached a picture, but the crack is kinda hard to see it is inside the white area. What is the best way to repair it and do I need to drop the water level so it can be dried out? I've decided to empty and refill the pool after getting rid of the iron stains so it could be repaired then if it needs to be dry.