For sale is an Eschopps 30" refugium set-up . It comes with an Eschopps continuous overflow box , Rio return pump , all plumbing , and bio-balls . I used it for about a year and a half before dismantling my aquarium . Everything is is very good condition . This is a great place to grow your macro algae and filter your water . If you have any questions or concerns , please do not hesitate to contact me . Thank you very much .