Aquarium Pump Errors

Living Oceans

If you've noticed that water has stopped circulating in your Living Oceans Aquarium, don't panic. In most cases, the problem is caused by sand or debris preventing the pump impeller from turning properly.

A return pump that isn't operating correctly should be addressed as soon as possible. Without water circulation, water cannot pass through the filtration system or heater, which can affect water quality and temperature.

Watch the video below to see how to remove, clean and reinstall the return pump. The guide underneath provides additional troubleshooting tips and maintenance advice.

Signs Your Return Pump Needs Attention

If the return pump has stopped working, you may notice one or more of the following:

  • Little or no water circulation from the return nozzle.
  • The aquarium water appears still.
  • An Error 04 (Er04) message displayed on the pump controller.
  • Unusual pump noise or vibration.

In most cases, Error 04 (Er04) indicates that the impeller is unable to spin freely because sand or debris has become trapped inside the pump.

If your controller is displaying Error 04, we also recommend following our Pump Error Er04 Troubleshooting Guide, which includes step-by-step photographs of the pump, impeller and reassembly process.

Before You Begin

Before removing the pump, prepare your workspace.

You will need:

  • A towel to catch any dripping saltwater.
  • A clean workspace.
  • Access to the pump chamber.

Then:

  1. Turn off the power to the aquarium.
  2. Remove the light.
  3. Remove the auto feeder.
  4. Remove the pump chamber cover.

How to Remove and Clean the Return Pump

Once the aquarium has been powered down, you can safely remove the return pump.

  1. Disconnect the return nozzle.
  2. Carefully lift the pump from the pump chamber.
  3. Place the pump on your prepared towel.

Next, disassemble the pump.

  1. Unscrew and remove the front screen.
  2. Remove the pump casing.
  3. Carefully remove the impeller.

You may find fine sand or debris inside the impeller housing. This is the most common cause of an Error 04 (Er04).

Clean the following components using fresh water and a soft cloth:

  • The impeller.
  • The inside of the pump casing.
  • The front screen.

Gently tap the casing to remove any remaining sand before reassembling the pump.

Tip: If you'd like additional guidance, refer to our Pump Error Er04 Troubleshooting Guide, which includes photographs showing each stage of the pump disassembly and reassembly process.

Checking the Rubber Grommet

When removing the impeller, the small rubber grommet may remain inside the pump casing or come out attached to the impeller.

If it becomes separated:

  • Refit the grommet before reinstalling the impeller.
  • Ensure the white ceramic face is pointing upwards, allowing the ceramic surfaces to run against each other correctly and minimise wear.

Reinstalling the Impeller

The impeller has a locating notch that must align with the guide inside the pump housing.

To reinstall it:

  1. Hold the pump so the power cable faces upwards.
  2. Align the notch on the impeller with the locating guide inside the housing.
  3. Push the impeller fully into position until it sits almost flush.
  4. Refit the pump casing and front screen.

If assembled correctly, the pump casing will fit together easily without forcing it.

Reinstalling the Pump

Once the pump has been reassembled:

  1. Place it back into the pump chamber.
  2. Reconnect the return nozzle.
  3. Restore power to the aquarium.

Before replacing the light and auto feeder, check that:

  • Water circulation has resumed.
  • The pump is operating quietly.
  • The Error 04 (Er04) message has cleared.

Once everything is operating normally, replace the pump chamber cover, light and auto feeder.

If the Error Returns

If the pump repeatedly displays an Error 04 (Er04), there is likely excess sand or debris entering the pump chamber.

Before contacting the Living Oceans Support Team, we recommend reviewing the Pump Error Er04 Troubleshooting Guide to ensure the pump has been cleaned and reassembled correctly.

If the error continues after following the guide, inspect the pump chamber and remove any accumulated sand or debris. If you're unsure why sand is entering the chamber, please contact the Living Oceans Support Team for further assistance.

Other Pumps in Your Aquarium

Your Living Oceans Aquarium contains three pumps:

  • Return pump – Circulates water through the filtration system and heater.
  • Auto Top-Off (ATO) pump – Replaces water lost through evaporation.
  • Maintenance pump – Used during maintenance procedures.

If either the ATO pump or maintenance pump stops working, the troubleshooting process is the same. Remove the pump, clean the impeller and casing, remove any sand or debris, then reassemble and test the pump.

Routine Maintenance

The pumps require very little maintenance, but a few simple checks will help keep them operating reliably.

We recommend:

  • Checking that water is circulating normally each day.
  • Inspecting the return nozzle for normal flow.
  • Cleaning the pump impeller if an Error 04 (Er04) occurs.
  • Preventing sand from accumulating in the pump chamber.
  • Contacting Living Oceans if the same error continues to occur after cleaning.

Need More Help?

If you've completed the troubleshooting steps and your pump is still not operating correctly, please contact the Living Oceans Support Team (support@livingoceans.com.au)

To help us diagnose the issue as quickly as possible, please include:

  • Your aquarium model (80L, 130L or 200L).
  • Which pump is affected (return pump, ATO pump or maintenance pump).
  • Any error message displayed on the controller.
  • Photos or a short video of the pump and controller.

This information will help us provide the fastest and most accurate support.