A 2hp pump is WAY too big for a 7.5K pool. I have a 27ft AG pool and I have a 1/2hp full-rated inground pump and it does just fine. In the case of pools, too big is not better because many times when you have too powerful of a pump you either blow right through the filter media or you can actually damage it. Mark will give you good advice about what a good pump would be for your pool.