In my 15g I'm using a used Mini-Vortex I got from a certain someone here 
. It does a pretty good job of diffusing the CO2 into the water, with absolutely no visible bubbles coming out of the bottom and floating to the surface.
I actually have a pretty interesting idea on paper for a little somethin'...
. It does a pretty good job of diffusing the CO2 into the water, with absolutely no visible bubbles coming out of the bottom and floating to the surface.I actually have a pretty interesting idea on paper for a little somethin'...
