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How to fix Fluval G3 and G6 ‘conductivity out of range’ issues

If you are using the Fluval G3 or Fluval G6 in your fish tank, then the LCD screen may show the “Conductivity Out of Range” alert. To see how you can potentially fix this issue, you can take a look at this troubleshooting article at Aquarium Blueprints.

Why the Fluval G3 or G6 is displaying “Conductivity Out of Range”

Your Fluval G3 or Fluval G6 may display the conductivity range alert message if the following is detected by your filter:

  • Lack of water in your canister filter.
  • Trapped air bubbles in your canister.
  • The GH (General Hardness) and/or KH (Carbonate Hardness) have changed enough to knock the electrical conductivity out of range.
  • Rise in nitrate levels.
  • Fertilizers, chemicals and/or pollutants may have been added, causing the electrical conductivity to shift out of range.

How to fix “Conductivity Out of Range” issues for your Fluval G3 or Fluval G6

In order to return the electrical conductivity range back to normal, we recommend that you take the following steps:

1. The first step we recommend taking is to unplug your canister filter from the power outlet.

2. Afterwards, detach the hosing and then open the canister.

3. Make sure that the filter cartridges are properly installed.

4. If everything looks fine, you can close the filter and then reconnect the hosing.

5. Afterwards, we recommend that you press the priming button on your G3 or G6 all the way down several times until you notice that there are no more air bubbles coming out of the output nozzle.

6. Once you are done priming, plug the canister back into the power outlet and then wait for at least 24 hours for the G3 or G6 to get rid of any remaining trapped air bubbles.

7. If you are still getting the “Conductivity Out of Range” alert on the LCD screen of your Fluval G3 or Fluval G6 after making changes to the canister, then your issue may be related to the tank water.

To get the electrical conductivity of the water in your aquarium back into the recommended range, we recommend doing daily water changes.

Keep in mind that your fish will become stressed, and even sick, if the water parameters get changed dramatically and suddenly. Therefore, we recommend swapping out no more than 20% of water over a 24-hour period to get your aquatic pets better acclimate to the changing water.

Water changes will help with reducing nitrates as well as diluting any fertilizers, chemicals and/or pollutants in your tank water. Furthermore, it may also help get your GH or KH levels back to normal.

After making changes to your tank water, you need to wait for at least 24 hours for your G3 or G6 to get an accurate reading on the conductivity of your aquarium.