I am in the planning stages of building a new octopus tank. I am uncertain as to whether I should incorporate an overflow box on the back of the tank with slits built into the rear tank wall to feed it or just use a 1.5" bulkhead with a strainer on it instead. I currently run two tanks (20 gal) off the side of my sump using bulkheads with strainers and they seem to work fine. Is there any reason a overflow box would work better that I am unware of? Thanks.