Endurance: Standard Configuration Backwash

These exceptional filters backwash automatically, several times a day. The user does not need to turn off the pump or close any valves during the backwash sequence. The filter does not require an electric timer. The backwash cycle is regulated by the air that is injected into the charge chamber. The filters clean and recycle the dirty water produced in backwashing every two to three hours. Sludge is only removed once or twice a week.


These Polygeyser® filters will backwash themselves so you do not need to manually initiate backwashes on a regular basis. You will need to adjust the air using your air gauge so that your unit regularly backwashes four to six times a day.  If you notice your filter is not backwashing as vigorously as it had been previously, running the air on high will force the unit to backwash a few times to dislodge stubborn deposits. Be aware that the water will become temporarily cloudy from fine solids. Then reset the air gauge to normal operation (four to six backwashes a day).

When Draining Your Filter Water

These units are different from many filters on the market and special care needs to be taken when draining these filters due to the unique auto-backwashing mechanism.

  • Do not drain the tank completely unless the inlet valve is closed. Beads will escape the filter if the valve is open.
  • When draining the filter while the inlet valve is open, do not drain below the inlet or beads will escape.

Setting The Sludge Removal

If your filter is utilizing the auto-purge features, there are different methodologies for setting the amount of sludge to be removed. You can adjust air flow to remove more or less sludge.

For mineralization in aquaculture, consider letting more sludge pile up within the sludge chamber for digestion. This can help increase available nitrates for plant culture. Test the water quality to ensure the water remains suitable for the fish. More frequent water changes may be needed, or more frequent backwashes to remove excess solids. Running at a lower air pressure will keep the system from purging larger solids from the system.

For fish culture exclusively, purge sludge preemptively to prevent declines in water quality. Set your unit to remove larger amounts of sludge to lower the amount of waste breaking down in the system. Adjusting for more powerful air flow will result in a stronger current that will lift more sludge and waste out of the filter. This filter will also backwash more frequently when being operated in this manner.