Glass Diffuser Problem

[goosej13]

Hey guys
I just got this glass co2 diffuser.... its a Spiro 7K CO2 Diffuser .... i got it off ebay


Well the thing seemes plugged... is this normal... it won't go through the white stone at the top... am i doing something wrong?? its hooked up to a DIY yeast operating

 

[Teelie]

The bubbles that go through the top will often be tiny, almost imperceptable. Mine is a Rhinox and the bubbles definitely go through it but most of them are so tiny you have to squint to even see them. Are you sure the yeast are producing CO2?

 

[Squid]

sounds familiar. see here.