I'm researching cichlids and their care, and came across this website: It says canister filters are required for cichlids since you have to pack a lot of them in the tank. Is this true? I have 2 HOB filters I plan to use for my 55 when it's time to set it up (Aquatech 30-60 w/ 330gph, AquaClear 50 w/ 200gph; altogether 530gph), and I don't really want to spend such a high price on a filter when I already have these two. So, is it required to use canisters for a cichlid tank? Or are my two filters enough? I will not even attempt cichlids if my filters are not ideal.