This might sound dumb to most of you but I just got my first CO2 not even a week ago. Seems like all the bubbles are just hanging out on the water's surface, is this a bad thing??
It's a 5.5gal with an internal Tom filter with spray-bar attached. The diffuser is as close to the bottom of the tank as I can get it and positioned underneath the spray-bar. Got about 2bps of CO2 going.