A C02 tank ? for calc reactor

[hellspawn2]

Hey everyone,
I built my dual chamber reactor and started looking into getting the c02 tank. I stumbled across a old helium tank in my parents garage and thought that this should work. Whats your opinion good and bad?
Thanks,
Hellspawn2

 

[wamp]

As stated above check with the Local shop.. I got mine for 50$. I took it back and their was only a 5$ exchange that way.