Aquarium Water Pumps & Pond Pumps

How to Choose an Aquarium or Pond Pump

Start with the flow required at the actual operating head. A pump’s maximum flow is generally measured under low-head conditions, while maximum head is the point near which usable flow approaches zero—not the recommended working height.

• Calculate the vertical lift from source water level to the outlet.
• Allow for friction from pipe length, diameter, bends and equipment.
• Check the manufacturer’s flow-versus-head information where available.
• Confirm freshwater, marine, pond, submerged or external installation suitability.

Sump Return and Aquarium Pumps

A return pump must deliver the required flow after lifting water from the sump and pushing it through the plumbing. Adjustable DC models can help tune output, but the selected pump must still meet the operating head.

Pond and Fountain Pumps

Pond pumps may power circulation, filtration, waterfalls or fountains. Each application has different head and solids-handling needs; a fountain head or accessory listing is not itself a pump.

Solar and Controllable Pumps

Solar output changes with sunlight unless a supported battery system is present. Electronic control can reduce pump output within the product’s operating range, but it cannot make an undersized pump overcome excessive head.

Installation and Pump Maintenance

Install the pump with the specified intake clearance, plumbing and electrical protection. Never run a pump dry unless the manufacturer explicitly permits it.

Disconnect power before servicing. Clean the impeller, intake and housing as directed, inspect seals and hoses, then confirm normal flow and no leaks after restart.

Related Categories

Compare pond pumps, solar pumps, controllable pumps and DC pumps.

Buy Aquarium and Pond Water Pumps Online in Australia

Compare current pumps by flow at head, maximum head, energy use, inlet and outlet size, installation type and warranty. Order online across Australia or get local Sunshine Coast support.

Frequently Asked Questions

What does litres per hour mean on a pump?

It states a flow rate, often the maximum under low-head test conditions. Installed flow is usually lower once lift and plumbing resistance are added.

What is maximum head height?

It is the approximate height at which the pump can no longer produce useful flow. It is not the recommended normal operating height.

How do I size a sump return pump?

Estimate the required return flow, calculate vertical lift and plumbing losses, then use the manufacturer’s flow-versus-head information.

Can every submersible pump be used externally?

No. Use a pump externally only when the manufacturer explicitly allows that installation.

Why has my pump flow dropped?

A blocked intake, dirty impeller, clogged plumbing, restricted valve or added head can reduce flow. Disconnect power and inspect it according to the manual.