The DIY method is very inconsistent. That's it's biggest drawback. A pressurized CO2
system will output the same volume of CO2
as long as the tank isn't empty. A DIY CO2
system ramps up, then tapers off to nothing. Messing with the mixture can help, but it's difficult to get any consistency beyond more than a few weeks time. I have DIY CO2
on my 29g and my 20L It works fairly well on the 20L because it has a tight-fitting top. The effects on the 29g are marginal-decent. I really should add a second bottle to the 29g. I'll probably go pressurized eventually.