ok guys, any one have any good ideas on the y way to do a complete D-I-Y CO2 system??

i don't really have a lot to spend so the cheeper the better!! i need one for a 50,40, and 10 gallon aquariums. the 50 and 40 are more improtant and the 10.


so if you guys could possibly come up with a list of what some one would need for a CO2 system, i would greatly appreciate it, thanks in advanced!


Tyler