The Dalua Great White DC Plus is a professional-grade, in-sump protein skimmer series engineered to remove dissolved organic waste, proteins, and impurities from marine reef aquariums. Designed around high-efficiency needle-wheel skimming technology, it converts water into millions of dense microbubbles every second. This action strips waste out of the water column before it can break down into toxic nitrates and phosphates.
The standalone feature of the "Plus" generation is its emphasis on silent cabinet operation, maintaining a sound profile under 30 decibels. This quiet performance is achieved by pairing an ultra-low vibration 24V controllable DC pump with a proprietary in-built air silencer embedded directly within the inner neck ring, eliminating the bulky external air mufflers common on legacy skimmers.
Three-Point Control Mechanism
Rather than relying on a single point of restriction, the Great White DC Plus utilizes three independent adjustment vectors to perfectly balance the foam head:
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Precision DC Controller Speed: Directly alters the internal motor RPMs across electronic power steps. Lowering pump speed drops the internal water line, while raising it pushes the foam higher up the neck.
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Mechanical Output Gate Valve: Adjusts physical backpressure within the skimmer body. Turning the precision adjustment valve raises or lowers the overall internal water height to match varying sump depths.
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Dedicated Venturi Air Intake: Fine-tunes the physical volume of raw atmospheric air pulled into the needle-wheel impeller, directly influencing bubble density and size.
Technical Specifications & Sizing Matrix
The range spans multiple body sizes to fit diverse aquarium bioloads and cabinet footprints:
| Model Size |
Physical Footprint (L × W × H) |
Air Intake Capacity |
Heavy Bioload Rating |
Light Bioload Rating |
| GW-7 Plus |
22.2 cm × 17.1 cm × 52.0 cm |
700 LPH |
Up to 400 Liters |
Up to 900 Liters |
| GW-12 Plus |
22.2 cm × 17.1 cm × 60.0 cm |
800 LPH |
Up to 600 Liters |
Up to 1,500 Liters |
| GW-17 Plus |
Sump space footprint scales proportionally |
1,200 LPH |
Up to 900 Liters |
Up to 2,000 Liters |
| GW-22 Plus |
Sump space footprint scales proportionally |
1,600 LPH |
Up to 1,300 Liters |
Up to 2,500 Liters |
| GW-30 Plus |
High-capacity wide-body chassis |
2,200 LPH |
Up to 1,800 Liters |
Up to 3,000+ Liters |
Core Structural & Functional Features
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Ultra-Wide Neck Profile: The upper reaction cone transitions into a widened neck track. This structural expansion gives rising bubbles maximum contact time with the organic waste layer, stabilizing the foam column so it doesn't instantly collapse when adding hands or food to the display tank.
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Smart Delayed Feed Intermissions: The standalone hardware controller block features a dedicated Feed Button. Pressing it immediately shuts down power for an adjustable window of 15, 30, 45, or 60 minutes, keeping the skimmer from overflowing when aquarium additives or concentrated coral foods disrupt water surface tension.
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Extra-Long Waste Drain Tube with Tap: The heavy-duty acrylic collection cup includes a pre-installed, high-clearance flexible drain line terminating in a mechanical ball tap. This setup lets you drain dark organic skimmate directly out into an external waste reservoir bucket without physically lifting off and spilling the collection cup.
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High-Efficiency Diffuser Bubble Plate: The internal output chamber features a perforated acrylic grid plate located right over the pump exit. This plate diffuses raw turbulence into an even, vertical rise, preventing aggressive water currents from popping the microbubbles before they can grab organic proteins.
