A troubleshooting guide

Internal filter flow rate has stopped or dropped considerably

1. Check for blockages to the filter inlets, making sure plant matter or other organic waste has not caused an obstruction.
2. Remove filter media and clean. If foams have lost their shape or are worn out then replace.
3. Check impeller assembly. If this is dirty or damaged this will cause the impeller to slow down or stop. Refer to the manufacturer's instruction booklet for cleaning and servicing the filter.

External filter flow rate has stopped or dropped considerably

• Check for blockages to the filter inlet, making sure plant matter or other organic waste has not caused an obstruction.
• Check inlet and return tubing for obstructions.
• Remove filter media and run filter without media. If flow rate returns, the problem is caused by dirty or defective media. This should be cleaned or replaced. If with the filter media removed the flow rate has stopped, the fault is with the impeller assembly.
• Check impeller assembly. If this is dirty or damaged this will cause the impeller to slow down or stop. Refer to the manufacturer's instruction booklet for cleaning and servicing the filter.

Internal filter is noisy

• When operating the venturi on internal filters, unavoidable noise will be created as air is forced into the water flow under pressure. If the noise is too intrusive, the air flow in the venturi can be turned down or turned off. Refer to the manufacturer's instruction booklet for further information.
• If the noise does not emanate from the venturi then the impeller assembly may need cleaning or is damaged. Refer to the manufacturer's instruction booklet for further information.

External filter is noisy

• A noisy external filter can be caused by air in the filter system usually in the impeller assembly. Turn the power off and re-prime the filter following the manufacturer's instructions.
• If the noise remains then the impeller will need cleaning or is damaged. Refer to the manufacturer's instruction booklet for further information.

Internal filter air flow has slowed or stopped

• Check that the air intake to the venturi is not submerged; it will only work if the venturi inlet is above the water surface.
• Ensure that there are no blockages in the venturi pipe or pump outlet. Problems with the venturi are usually caused by poor flow rate. Refer to the manufacturer's instruction booklet for further information on cleaning the venturi section and impeller assembly.

Water will not stay crystal clear

• Check that you have the right size filter for the aquarium, especially if you have large fish (goldfish, cichlids for example) as these produce a considerable amount of organic waste. You might need an upgraded filter.
• Ensure that the flow rate is correct and that the filter media is correctly fitted as per the manufacturer's instructions.

There is no air flow from air pump

• First check the airline and the non-return valve (if fitted) for blockages.
• Inspect the air filter which is usually fitted under the air pump to see if it is clogged with dust. If dirty, replace.
• If air flow is still slow or stopped, the diaphragm assembly may be faulty. Refer to the manufacturer's instruction booklet for further information on checking and servicing.

Aquarium water is not at the correct temperature

• Ensure that the temperature setting on the heater is set correctly, normally between 24c and 26c.
• Is the red light indicator on when the water is cold? If the light is off, turn the power off and increase the temperature setting. If red light indicator is still off when the power is turned back on, the heater element may be faulty. Refer to the manufacturer's instruction booklet for further information.