I need your help again,but this time it's for a calcium reactor do I buy a plug and play or do I buy fom here and there and assemble my owne.Looking for some suggestions i'm lost when it comes to reactors I don't know where to start.This will be for my 120rr (sps,clams and lps) thanks again.BTW I made a call to my local welding supply store and he has a steel 10pound CO2 filled for $100 and the aluminum is almost tripple the cost.