Some filters will become air locked using this method of diffusion. Meaning, when the impeller gets surrounded by air it stops moving water. It all comes down to the internal workings of the filter.
I would suggest using an airstone to get the bubbles down to a more palatable size, then feeding them into the intake (in the tank) of the filter. It may still airlock. If this doesn't work you could always try using a powerhead in the same manor.