Tunze Nano 9002 Skimmer - No bubbles

[Leon71]

Has anyone purchased a Nano 9002 skimmer lately? I bought mine on Boxing Day. I had it running on my QT tank for the last three weeks. I do not get any bubbles at all from it. At first I thought it was just breaking in. Took it apart and checked to make sure the air line was not kinked or plugged. If I blow in the air tube, I do get bubbles. I think it is the venturi. Has anyone had this problem? Does anyone have a spare venturi in Edmonton, until I can get a new one? Thanks for the help. Leon