i currently have a cascade 1500 which is doing a good job. i know i'll need more mech filtration in the future as my fish grow. I was planning on getting an FX5 but i dont have the room for it under or beside the tank. I see there is a big jump from canister filters that are good for up to 150-200g then there is a big jump to the FX5 at 400g. my filter is supposed to be good for 200g but i doubt it can handle my packed 150. is there a good single canister filter that can come close to the FX5? the Fx5 is just 4" too wide to fit unter my tank. Adding a second canister filter is not an option. oh, and i have 2 penguin 350s on the back if that makes a differance.
