I'm thinking of doing co2 and am interested in seeing what every one else is doing. So let's see em! Whatcha got, what's it doing, how's it work, what ya growing with it?
Here is my setup without the CO2 tank and regulator. Picture was from when I was setting it up. You can see my CO2 reactor on the bottom (white). Everything is in-lined (Filter > UV > Heater > Reactor)