The Hang-on Overflow Box is for use in aquariums that would benefit from sump filtration but lack pre-drilled holes for the sump intake and return. The simple-to-install kit Overflow Accessory Kit contains bulkhead fittings, adjustable drainpipe, return pipe with dual flexible nozzle and straight barb fittings. Fits MegaFlow and Corner Overflow aquarium systems.

• Ready your aquarium for advanced sump filtration
• No need to empty the aquarium or drill holes