I am designing a 4 ft. sump tank (18" deep, 20" tall). Setting it up with 3 compartments, Is it best to put the refug. in the middle or at the end. PS in the remaining compartment. My return pumps are capable of about 3000 gal. an hour. Would this be to much flow for the refug. if it was in the middle ? Should I put the refug. at the end and divert about 25 percent of the total over flow to its compartment and have it overflow into the middle with the protein skimmer at the other end also overflowing to the middle. My main tank is 220g. Any comments would be appreciated.