I am considering a fiberglass pool. Having trouble finding the design I want. I am interested in a pool for water volleyball. I have smallish children who would want to play. Ideally, something around 40' long and as wide as possible. 3.5' deep on each end, gradually sloping to 4.5' deep in the middle. The "hyperion" by Trilogy pools is the closest thing I can find. It says it is 5'4" in the middle. That would be too deep for most adults people to play at the net. Water level would be at the nose for many people. Over the head of most children. I'"m wondering if 5'4" is the actual depth of the water? Or is there going to be 6" or so from the top of the water to the top of the pool. Even 6" more shallow would make this pool more doable.