Hi guys and gals. I'm looking to get a new filter for my little 30l tank. The integrated filter has a very large filter capacity, which is excellent, but produces very little water movement. There isn't really any room for another filter merely to provide flow. So I'm looking to rip out the integrated filter and replace it. Ideally I would like a filter with a spray bar, or to which a spray bar can be attached. Given the size of the tank I think I'm restricted to internals. Do any of your guys have any suggestions? Thanks.