well i'm not sure how much extra this could handle, i haven't run any tests yet. but i doubt i have 5 gallons, so i will be cutting the baffles down. i have a router so i shouldn't be to hard. i'm putting this on a 54 corner, does anyone think i should be going bigger with this sump? i don't mind scrapping this as a test run. i was trying to make the biggest fuge area i could!