Well I know this is counting your chickens before they cross the road but both filter systems are on the shelf waiting for my 225 tank to get out of dry dock undergoing major repairs and restorations (The USS Midway). Given that all the advice given on which filter system I should get was split between canister and sump, I decided to get the best of both worlds so I got both the FX5 and today I received my Toms PRO S4 wet/dry sump with auto filler tank on super sale at Big Al's. So between the two systems I hope to get great filtration results in my 225 tank which will eventually be the new home for my growing 14 AF Cichlids which are growing big fast in my 80 tank.