It's an oceanic biocube skimmer. It's driven by air not venturi. It's a new airstone so that may be part of it
Oh I see, and yes maybe the airstone is the problem ... is it a wooden one or a ceramic one ... if ceramic I would replace it by a wooden and also if you put a stronger air pump on it it will produce more and smaller bubbles. That is if you want to make the change .. with a low load it may not yet be needed.



