Aquarium Overflow Guard – Surface Flow Baffle

This 3D-printed overflow guard is designed to mount along the top edge of an aquarium overflow box, allowing controlled surface water flow while preventing debris, livestock, and floating material from entering the overflow.

The guard features evenly spaced vertical slots that maintain consistent water intake while preserving surface skimming efficiency. Once glued securely to the top of the overflow box, it creates a protective barrier that improves flow stability and reduces the risk of clogs, splashing, or livestock loss.