It depends on the pump. Hayward makes a 1hp Superpump that's for IG pools. It's also what's called "full-rated". It will not only be more than adequate with your pool, it won't over-stress your filter.

But there's even better--they make it as a 2 speed! I have the 2 speed version and I will NEVER have a single speed again! It's worth EVERY DIME, and 99% of the time you can run it on low and save electric $$$ and it's super-quiet. I run it with a 200# sand pump so yours will EASILY accomodate it. I do believe that the major difference in sand filters seems to be that top-mount are for A/G and side-mount for I/G....That's where the 6-way valve and fittings go.