I have a 75 gallon aquarium with a Fluval 406 canister filter. I just purchased a Fluval FX6 as a second canister filter for more flow/filtration. My question is what would be the best way to set up the intakes and outputs of both canisters? What configuration would be most effective? It is an Mbuna tank with 90 pounds of rocks that run the length of the tank about a foot high.