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: These are made bespoke to order and require 2 to 4 working days to be built and for the glue to cure.

DUE TO SUPPLY ISSUES AND INCREASED MANUFACTURING COSTS WE ARE CURRENTLY CLOSED FOR ALL NEW ORDERS. WE WILL BE BACK IN 2024.


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Let us know if you want something bespoke or how we can improve on our designs: