ProCo2 buckets were created to increase your yields and overall plant growth at a minimal cost.
Mini Pro Co2 - 2'x2' garden area, expires 3 months, net wt 2lbs, height 5", diameter 4.5"
Regular Pro Co2 - 3'x3' garden area, expires 4 months, net wt 3lbs, height 8", diameter 5.5"
XL Pro Co2 - 5'x5' garden area, expires in 7 months, net wt 5lbs, height 9", diameter 8"
The ProCo2 bucket includes a handle and s-hooks, to make it easily hang-able. No maintenance or refills are required.