I have a 55 gallon tank, all freshwater, tetras and such.
The tank is 6months old and so is the Eheim Filter, model 2215.
This morning I awoke to it making noise, as if was obstructed?
No water is being sent back into the tank...not sure if any is being
drawn out.
Any assistance would be appreciated, I am baffled and a bit worried.

Thank you
Matt