DIY CO2 starts syphon by itself.
I whipped up a diy co2 setup via the instructions on Rex's site. Good thing I took a quick look before I left to go out tonight, because it started a syphon from my tank back into the diy co2 setup all by itself. Of course the yeast haven't kicked off yet so there is no pressure, but what will happen when the fermentation finishes while I'm at work or something? I understand gravity and syphoning, but usually you need to start the syphon before it starts syphoning. Water temp difference or something creating a vacuum? I'm not a phyiscs guy, so I don't know... I'm not so sure I want to use a diy co2 setup now. I can't get the setup higher than the tank, or even higher than the limewood bubbler for that matter, without getting unsightly and obscuring the front of my tank with a table stacked with books to raise the setup. I had planned for everything to live under the tank so to speak.