Custom Aquariums presents the Stealthbox, an external aquarium overflow box which has 1200, 2400, or 3600 gallon per hour capacity and no visible water lines!
I got the Modular Marine external low profile overflow box. What I really like about this is it uses bulkheads instead of gluing any fitting directly to the box plus the weir is removable for easy cleaning. What I don't like is the price ?