Custom overflow box weir for marine fish tanks.

Designed to be siliconed to the back/bottom of your aquarium for overflow pipes that would enter through the bottom panel (silicone not included).

The overflow box has a front and 2 sides (please see diagram). The height measurement is to the top of the teeth.

Features: 

  • 3mm black Acrylic.
  • Accurately CNC machined components.
  • Custom sizes available.

Comb/teeth size: The slots measure 20mm (height) x 4mm (width) in size.

Please remember: Due to the surface tension of the water, your final water level is likely to be 3 to 6 mm higher than the bottom of the teeth (depending on your return pump flow rate). For example; if you buy a 500mm high weir that has 20mm teeth, your final water level will be around 485mm.

If you require a different size comb hole please add it in your order notes.

Please note: Currently we have a 1 week lead time. This item is made bespoke to order.