Ultra-Flow Weir Comb

The Ultra-Flow Weir Comb is D-D’s high-performance overflow upgrade engineered to maximise throughput, stabilise water levels, and eliminate the common issues seen with older vertical-slot weirs. With its hybrid vertical-and-horizontal slot design, the Ultra-Flow increases water passage by 30–50%, maintaining a low, controlled running level while allowing you to run larger, more powerful return pumps without risk of overflowing or touching bracing bars. Easy to install, easy to clean, and built for long-term reliability, it’s the reefkeeper’s essential flow optimisation tool.

 

Key Benefits

• 30–50% more flow than standard vertical weirs

• Prevents high display waterline, bracing-bar contact, and overflow risk

• Supports higher return pump flow rates without compromise

• Easy-clean removable grill (when used with runner on 10mm glass or less)

• Stable, efficient, modernised weir performance

 

Core Features

• Hybrid slot design: Vertical + horizontal drains increase flow consistency

• Adjustable runner system: Suits 6–8mm glass (and even 10mm); for thicker glass, simply remove runner and bond directly

• Removable grill for maintenance when using runner

• 60 cm length ideal for most reef systems

• Simple, tool-free installation

 

Technical Specifications

• Length: 60 cm

• Slot Type: Vertical + horizontal hybrid

• Glass Compatibility:

  • With runner: 6–8mm (up to 10mm)

  • Over 10mm: Bond directly to glass

• Maintenance: Removable grill when using runner on 10mm or less

 

Who Is This Product For?

Perfect for reefkeepers who:

• Want to upgrade from older overflow combs

• Need higher flow capacity without raising tank water levels

• Run powerful return pumps

• Require easy access for cleaning

• Want a stable, modern overflow solution