Ok spoke with my builder today. Here is what we are going to do. (See image). We are going to drop the floor in the fish room 12". The pipes will enter the room at about 10" through the 12" wall. The pipes will then enter the sump straight and into the side wall of the sump. I didn't show it in the picture but the pipes will slope under the floor to the fish room. On the emergency overflow line, that line will enter the sump through the side but above the normal water height. I will put a T fitting and ball valve on that line to remove any water that may remain in that line. I could also put a shop vac on it if needed.