D-D Funktion Return Pumps

The D-D Funktion Return Pumps are powerful, energy-efficient DC pumps equipped with a unique multi-function digital controller, delivering superb performance for a wide range of aquarium applications. Whether used as a main return pump, to run media reactors, or externally as a closed-loop system (5000–20000 models), these pumps provide reliable, consistent flow with ultra-low noise thanks to sine-wave motor technology. Fully submersible, saltwater-safe, and engineered with corrosion-resistant ceramic components, they offer quiet, dependable operation for both freshwater and marine environments.

Key Benefits

• Quiet, efficient water movement using low-voltage sine-wave motor technology

• Can function as a return pump, reactor feed pump, or closed-loop pump (5000+ models)

• Digital controller offers wave, pulse, storm, and constant flow modes

• Enhanced aquarium flow by pulsing the return line safely without altering display water level

• Corrosion-resistant ceramic bearings for long-lasting durability

• Flexible installation options, including external mounting on larger models

Core Features

• Multi-Function Digital Controller:
  Touch-button control pad with LCD colour display, screensaver, adjustable brightness, multi-language support, four flow modes, feed mode, and on/off function.

• Return-Line Pulse Mode:
  Use the controller to pulse your return, adding variable flow from the sump outlet without causing overflow noise or water-level changes.

• Flexible Installation:
  Fully submersible on all models; external installation available on FP5000, FP6500, FP10000, FP15000, and FP20000.

• Versatile Output Positioning:
  Pump outlet rotates to face upwards, left, or right.

• ‘Elephant Nose’ Suction Attachment:
  Draws water from the bottom of the sump/tank to eliminate surface vortices, reduce bubble carryover, and lift detritus for filtration.

• Easy Maintenance:
  Detachable footplate with anti-vibration feet, quick-couple unions, and multiple pipe connection options included.

• Smart Protection:
  Run-dry detection with automatic shutdown.

Technical Specifications

FP2000

• Max Flow: 2000 L/h

• Max Head: 2.2 m

• Max Wattage: 20 W

• Power Output: 24 V

• Rigid Adaptors: N/A

• Flexible Adaptors: 16 mm / 20 mm

FP3500

• Max Flow: 3500 L/h

• Max Head: 3.5 m

• Max Wattage: 28 W

• Power Output: 24 V

• Rigid Adaptors: 25 mm

• Flexible Adaptors: 25 mm / 20 mm

FP5000

• Max Flow: 5000 L/h

• Max Head: 4.0 m

• Max Wattage: 40 W

• Power Output: 24 V

• Rigid Adaptors: 25 mm / 32 mm / 40 mm

• Flexible Adaptors: 20 mm / 25 mm / 32 mm

FP6500

• Max Flow: 6500 L/h

• Max Head: 4.5 m

• Max Wattage: 48 W

• Power Output: 24 V

• Rigid Adaptors: 25 mm / 32 mm / 40 mm

• Flexible Adaptors: 20 mm / 25 mm / 32 mm

FP10000

• Max Flow: 10,000 L/h

• Max Head: 6.0 m

• Max Wattage: 80 W

• Power Output: 24 V

• Rigid Adaptors: 25 mm / 32 mm / 40 mm

• Flexible Adaptors: 20 mm / 25 mm / 32 mm

FP15000

• Max Flow: 15,000 L/h

• Max Head: 7.0 m

• Max Wattage: 120 W

• Power Output: 24 V

• Rigid Adaptors: 40 mm / 50 mm

• Flexible Adaptors: 32 mm / 38 mm / 50 mm

FP20000

• Max Flow: 20,000 L/h

• Max Head: 9.5 m

• Max Wattage: 180 W

• Power Output: 36 V

• Rigid Adaptors: 40 mm / 50 mm

• Flexible Adaptors: 32 mm / 38 mm / 50 mm

FP Pro 30000 (NEW)

• Max Flow: 30,000 L/h

• Max Head: 10 m

• Max Wattage: 450 W
  

• Rigid Adaptors: 50 mm / 62 mm

Who Is This Pump For?

• Reef keepers wanting advanced, controllable return-line flow

• Marine aquariums requiring ultra-quiet, energy-efficient return pumps

• Systems running media reactors or UV where dependable feed pressure is essential

• Sumps needing bottom-draw suction to prevent bubbles and detritus buildup

• Larger installations needing optional external pump mounting

Additional Information

The Funktion Return Pumps feature four fully controllable flow modes, giving you exceptional control over the movement within your aquarium. Each mode can be fine-tuned using the digital controller, allowing you to replicate everything from gentle lagoon sway to high-energy reef crest turbulence—all while maintaining stable sump levels and silent overflow performance.

Pump Mode

Runs continuously between your chosen minimum and maximum power settings (30–100), delivering a strong, steady return flow ideal for mixed-reef, FOWLR, or planted aquariums.

Wave Mode

Creates a smooth sine-wave motion as the pump ramps up and down between adjustable power limits. Perfect for simulating deeper reef environments or calmer lagoon-style movement, especially suited to LPS and soft corals.

Pulse Mode

Alternates rapidly between low and high power to form a standing wave within the aquarium. Ideal for SPS corals and high-energy reef crest flow patterns.

Storm Mode

Generates a randomised, chaotic flow by switching automatically between constant, pulse, and wave patterns. Excellent for lifting detritus into the water column so it can be removed by your filtration system.