Join Date: Jan 2006
Location: Burnaby, BC, Canada
It's because production is not steady...and in a big tank, you need a lot of CO2 all the time. I just switched from DIY for my 20 gallon to pressurized. Hooked up my solenoid and needle valve and Clippard tubing (Thanks Rex!) last night. I'll never go back to DIY. It's just a recipe for disaster if you have high light/EI.
Having said that, I am using a 4 L juice jug to do DIY CO2 to my low light 125 gallong SA biotope and it's working ok.
Filstar pimp #59 (shhhh on the Eheim)