D-D UltraFlow Weir Comb (60cm)
Maintaining high flow through a standard weir comb isn’t an easy task. Weir boxes are usually manufactured to be as small and unobtrusive as possible, but this often results in the display aquarium run height backing up due to the short linear length of the top of the weir glass and the added restriction of a standard weir comb.
The D-D UltraFlow weir employs horizontal and vertical drain slots, allowing around 30-50% more water to flow through the slotted sections compared to a standard vertical overflow comb. This greatly reduces the water run height of the display aquarium. When using restrictive standard vertical weir combs, water can start to back up in front of the combs and touch the brace bars, or in the worst case, overflow the aquarium.
Specifications
| Feature | Detail |
|---|---|
| Model | UltraFlow Weir Comb |
| Length | 60cm |
| Design | Horizontal and vertical drain slots |
| Flow Improvement | 30-50% more flow than standard vertical comb |
FAQ
How does the D-D UltraFlow Weir Comb improve water flow compared to a standard weir comb?
The D-D UltraFlow Weir Comb uses horizontal and vertical drain slots to allow 30-50% more water to flow through the slotted sections compared to a standard vertical overflow comb, reducing water run height and preventing back-up.
Can the UltraFlow Weir Comb be used in any aquarium setup?
Yes, it is designed for use in display aquariums where high flow and low run height are required, especially when standard weir combs cause water buildup.
Is the 60cm length suitable for large aquariums?
The 60cm length is ideal for medium to large display aquariums, providing sufficient coverage to manage water flow efficiently without causing overflow.

Melanie Gray –
Installed the UltraFlow Weir Comb in my 120cm aquarium and noticed a significant drop in water run height. The flow is much smoother and the water no longer backs up near the comb. Works well with my existing setup.
Heather Morgan –
Compared to my old vertical comb, the water level stays much lower now. The slots allow better drainage and the aquarium looks cleaner. Slightly more complex to install, but worth it.
Stewart Wilkins –
After switching from a standard weir comb, I no longer have to worry about water spilling over. The 60cm length fits perfectly and the flow is consistent throughout the tank.
Felicity Johnston –
Great improvement in water movement. The horizontal and vertical slots work together to reduce run height effectively. My tank now maintains a stable surface without overflow.