Are you planning one leaving the two AC110s on the tank along with the canister. IME the two ACs are more then enough filtration for your stock. If adding a canister with the ACs then a XP3 will add some extra bio but not much mechanical. The FX5 would add additional mechanical plus 5.9 liters of bio will be more then enough to support that tank without any modification if you decide to make that the only filter on the tank.
Never have owned any of the cf500s, wasn't very impressed with the results I found on then while researching them.
Never have owned any of the cf500s, wasn't very impressed with the results I found on then while researching them.