Have converted 10 gal tank to sump filter. Currently have a Aqueon AQ2300 in filter, way to much power for tank 317-608 gpm. Even at lowest setting it is ripping my moss off the driftwood. Will probably downsize to an AQ1200 106-317 gpm. My Cobalt canister said it pumped at 210 gpm, which I dought was in the tank. Since moved back to 55 gal tank. Tank sump uses twice the amount of medium and filtration pictured here.