I downsized about a year ago to a 46 bow. I bought it used... tank, hood, glass top, stand for $100, and for an extra $25, he threw in a Cascade 700 canister filter. I don't know a lot about canister filters or Cascade filters at that. From Googling it, it appears as if the filter works in up to 75 gallons. I'm pretty sure it is a 700 anyway. Is there any other filters that I should use alongside the canister? I've heard of some people using canisters together with another, whether it be underground, overhang... whatever. Any suggestions on if I should supplement that filtration and with what?