Thanks Don thats pretty much what i was looking for. Only thing on that diagram im a lil fuzzy on is the gravel vac chamber.... just sink the tube to the bottom of the tank filled with water? If its really this easy i should be up and running by tonight!!:headbang2:
im not sure about the gravel vac method, but you need some kind of little powerhead to circulate the co2 in the vac, so it'll diffuse in the water, the most affective method ive seen is this
http://www.youtube.com/watch?v=8xELv1lMjTw
thats a little 3 dollar powerhead from walmart with a little cup on it, you put the co2 hose in the cup, silicone it in there, then silicone a sponge to the bottom of the cup, the co2 gets agitated and diffuses in the water and can't escape from the cup until theres no bubbles, which is what the sponge is for,
the gravel vac method is similar, dig the gravel vag into the gravel, poke a hole and silicon the C02 to about the middle of the vac, the co2 rises to the top of the vac, and the put a powerhead on the top of the gravel vac, to mix around the co2, then once diffused it escapes through the water in the gravel..
the point of co2 is to keep it in the water for as long as possible, theres many methods, those are the two i know of..dont use a glass diffuser, those are for pressurized and wont work right.
post pics of it if you get it up tonight!