IceCap 2K Gyre Flow Pump (Pump Only)

IceCap 2K Gyre Flow Pump w/Controller for Compact Reef Circulation

The IceCap 2K Gyre Flow Pump with Controller creates broad water movement without dominating the aquarium. This little wavemaker is designed for 20 to 90-gallon tanks and moves water the length of the display, rather than creating one narrow, forceful stream. The cross-flow design is particularly useful for reef tanks where the rockwork can create stagnant pockets. The twin rotating cages distribute the current over a larger area, helping to lift settled debris, improve surface movement, and carry water around corals. Check out our Pumps & Flow section for more equipment for your aquarium's circulation and filtration. This model has its own controller and power supply, unlike the pump-only IceCap 2K. It is ready to run and does not require a separate WaveEngine.

Smaller Gyre Pump | A Wider Angle Aquarium Cover

Traditional powerheads generally focus their output in one direction. IceCap 2K produces a sheet-like flow that extends further through the aquarium before passing back through the display. This allows for smooth movement with fewer sharp pressure points directly in front of the pump. Its slim body can be mounted vertically, horizontally, or close to the water surface. Reef keepers can relocate the pump to pump water behind rockwork, over coral colonies, or through areas where detritus tends to accumulate. Key design features are the following:

• Cross-flow circulation: Produces a broad current, not a narrow jet of water.
• Max output of 2,000 GPH – Adjustable circulation for aquariums of 20 to 90 gallons.
• Easy Mounting: Suitable for horizontal and vertical mounting.
• Stealth housing: Maintains swimming room, making equipment less apparent.
• Secure magnetic mount: Designed for glass or acrylic aquarium walls up to 1/2 inch thick.
• Two propeller colors are included: black and orange rotor sets.

See our aquarium wavemakers. Compare with other controllable pumps and cross-flow systems.

The controller includes five flow patterns

The controller supplied allows the pump to act differently according to the needs of the aquarium. Rather than a steady stream all day, users can choose from five patterns that change the timing and intensity of the flow.

• Constant Mode: Keeps the selected output running continuously.
• Stream Mode: Creates continuous water movement change.
• Random Mode: Randomizes intensity for less predictable circulation
• Pulse Mode: Delivers timed bursts into the aquarium
• Cycle Mode – Changes flow patterns by alternating operation intervals.

Feed Mode - Fish and coral feeding, temporarily reducing disruption. Duration: 20 minutes. Night Mode reduces output when aquarium lights are dim, and the controller lock prevents accidental changes in settings. If a larger coordinated flow system is desired, the pump can also be integrated with a HYDROS WaveEngine or WaveEngine LE.

Where the IceCap 2K Excels

This model is ideal for nano reefs and medium-sized aquariums that need wide circulation without the output or physical footprint of a larger gyre pump. Its adjustable range makes it suitable for mixed reefs where different coral groups may react differently to water velocity. The pump can be aligned to:

• Moving Water in Long Or Shallow Aquariums
• Limit accumulation of debris behind reef structures
• Enhance movement on the sand bed
• Increase surface agitation & gas exchange
• Provide indirect flow around soft corals, LPS, or SPS corals

Actual placement and output should be adjusted for the aquarium dimensions, rockwork, substrate, and livestock. If you start with a lower setting, it's easier to see how corals and sand react before you turn up the flow.

IceCap 2K Gyre Pump Technical Specs

Specifications	Details
Suggested Aquarium Size	20-90 gallons
Maximum Flow	2,000 gallons per hour
Minimum Flow	739 GPH
Power Consumption	8-25 watts
Size	8.78 x 2.83 x 1.5 inches
Length of Cable	6 feet high
Max wall thickness of tank	½ inch (12 mm) acrylic or glass
Weight (approx.)	1 lb.
Guarantee	1-Year Limited Warranty

The Controller Package contains:

• IceCap 2K Gyre Pump
• Controller flow
• Power supply
• Magnetic Mount System
• Black & Orange Propeller Sets
• Getting started

Cleaning and maintenance

Gradually, mineral deposits and organic buildup can degrade pump performance. Regularly inspect and remove propeller cages, especially in high calcium and alkalinity systems. The removable parts can be steeped in a diluted aquarium-safe citric acid solution and thoroughly rinsed before reassembling. Do not force the propellers or use abrasive tools, which may damage the cages, shafts, or rotor surfaces.

IceCap 2K Gyre Flow Pump Questions

Is this the whole kit and caboodle for running the pump?

Yes. The IceCap controller and power supply are included in this package. It’s different than the IceCap 2K pump-only replacement model.

Is the IceCap 2K suitable for a nano reef?

It can work in aquariums as small as 20 gallons, but the positioning and output need to be carefully modified. Start low so as not to disturb the substrate or put direct pressure on corals.

Do you need a HYDROS WaveEngine?

Nah. The controller is included and will run the pump autonomously. This path allows for optional integration of HYDROS compatibility into a larger coordinated system.

Can I mount the pump vertically?

Yes. The cross-flow pattern can be modified to suit different aquarium shapes and rock arrangements with horizontal or vertical mounting options.

IceCap 2K or 4K. Which one is better for my aquarium?

The 2K is a better place to start for many aquariums from 20 to 90 gallons. The bigger 4K is for systems that need much bigger output and much more large-tank coverage.

Controlled Gyre Motion Without Pump Oversizing

The IceCap 2K Gyre Flow Pump with Controller is designed to operate between a conventional powerhead and a large cross-flow system. It provides ample, adjustable circulation in a compact package and includes the controls for daily use. If you are a reef keeper with a smaller display, it gives you that gyre-style movement without automatically moving you up to the size and output of the 4K.