My external filter was loud or gurgled after it was installed.
After a new installation, the remaining air escapes from the filter media during the first 5-7 days. This causes “gurgling” or intermittent rattling. Additional problems may occur due to transmission of resonance. Please make sure that the filter has 4 rubber feet on the bottom and only has contact with the cabinet there and nowhere else. Test by placing the filter on a soft surface, making sure that the hoses don’t have any contact with the stand either. If you notice air in the filter, please check the hose on the inlet side for air pockets and streams of bubbles. This would give an indication of the source of the trapped air.
My external filter makes loud, gurgling noises.
This is most likely due to a small bubble appearing periodically in the pump head of the CristalProfi which is then transported out of the filter.
If air enters the filter system, this may be an indication that a seal is no longer tight or that connecting pieces don’t close tightly. As there is constant slight low pressure during operation, this is not necessarily noticeable. In the event that there is a leak of this kind, you can test by switching off the filter temporarily, in which case a small amount of water would escape where the leak is. Please note: This test should only be carried out with careful monitoring.
Be sure to check the hoses on the inlet side for air pockets or fine streams of bubbles. Often this is merely because the hose no longer fits securely into the JBL InSet.
Another possibility: The filter material may be very heavily soiled, which can result in the formation of fermentation gas which is periodically pressed out of the filter.
Please restart the filter as follows:
Remove the water from the body of the filter and the hoses. Make sure that the two small stopcock levers on the pump head are in the “OPEN” position. During the following start up procedure, the water outlet pipe with the spray bar, etc. must be positioned ABOVE the surface of the water for optimal ventilation of the appliance. Press the “START” button on the pump head repeatedly with the palm of your hand until water begins to flow into the suction hose (hose on “IN”). Wait until the filter has filled completely with water and the water in the hose leading to the water outlet pipe (hose on “OUT”) is at the same level as the surface of the water in the aquarium. Connect the filter to the mains power supply. The water will now flow out of the water outlet pipe and into the aquarium. At first, it may be mixed with air that is still trapped between the layers of the filter media. Gently shake the filter to dislodge the air which will escape with the stream of water.
My filter won’t start back up again. What should I do ?
Please check the following: remove the pump head from the filter casing, remove the impeller cover and check whether the impeller is stuck. Remove the impeller and clean it and the impeller shaft. Afterwards reinstall the parts. Then shortly insert the plug into the socket. The impeller will run again and the magnetic force should be noticeable.
Are the CristalProfis of the e series also suited for saltwater/brackish water tanks?
Yes, they can be connected to a saltwater/brackish water tank without hesitation.
Can the output of an external filter decrease?
The motors in the pump heads of the JBL CristalProfi external filters are so-called synchronous motors, this means they rotate with a fixed speed that is dependent on the mains frequency, e.g. 3,000 rpm at 50 hertz.
Accordingly, an external filter can’t lose output. If the flow rate decreases, this is either due to soiled filter media or the formation of so-called biofilms, particularly in the hoses.
Please clean the hoses regularly with a hose brush to remove the biofilms. Flushing with warm water is not enough. At the beginning the cleaning interval may be increased.