The FX5 is so powerful that I use it to draw water out of my sump directly next to it, and return it 5' up and over the back into the main tank. Only downfall with the way I am using mine is I have to prime the intake using a Gravel vac because it can't start the process. But once it's running, it's golden.
Edit: Also, I'm using Seachem Pond Matrix in all trays and the Foams it comes with.