ProCo2 buckets were created to increase your yields and overall plant growth at a minimal cost. The Mini ProCo2 bucket is made for cloning or a smaller sized garden approximately 2×2 feet in size. ProCo2 will start releasing higher levels of Co2 when the sealant sticker is removed from the top of the bucket. The Mini ProCo2 bucket includes a handle and s-hooks, to make it easily hang-able. No maintenance or refills are required.