Hi Everyone! I've been away from the hobby for quite a while and would like to start a tank again. I'm not really looking for a high maintenance planted tank and was thinking of having some Jack Dempsey's. I'd like to have a 75 gallon with a pair. My LFS is currently selling a breeding pain who have been cohabitating for quite a while. Is a 75g big enough for a pair only with no other fish? If so, what would be a good canister filter option for that size tank?