I am thinking about adding another filter to my 240. Right now it has adequate filtration, but you can never have too much, so... I am trying to decide whether to spend less and get a Marineland HOT Magnum 350Pro with the biowheel and water polishing capabilities OR spend more and get a Hagen Fluval FX5. I am leaning towards getting the FX5. Anyone have experience with both filters? Either one? I have never had a Magnum350 or FX5 so any advice would be welcome.