not really actually i was just looking into doing a paintball co2 system i can get the canister from a friend
What size of tank do you intend to use the CO2 on? For larger tanks, a paintball system may be inefficient, as the CO2 tank will run out quickly, and you will need to go to the shop to refill it on a constant basis. In addition, the cost to refill a paintball tank, a 5 lb tank, a 10 lb tank, etc. is in general, the same.
and the other stuff well i dont know what i need
You will need a regulator, and a needle valve at the very least. Other suggested items include a solenoid, several check valves, some method of diffusing the CO2 and a drop checker.
If you are using a paintball canister, then you will need an adapter to convert from the normal CGA320 to a paintball pin-type connection.
and i cant fina good link on the internet that shows me how to make one im getting ticked
As mentioned, Rex Grigg's website has some good plans as well as pictures for in-line reactors.
http://www.rexgrigg.com/diy-reactor.htm
Edit: Here is another one built by mcd19
http://www.plantedtank.net/forums/diy/65191-my-diy-co2-reactor.html
Edit 2: Here is yet another style of a reactor:
http://www.plantedtank.net/articles/DIY-CO2-Reactor/2/
