Keep it fresh scrubbers will reduce ethylene levels up to 98.9 percent to reduce shrink and extend shelf life. The unit holds 50 kgs of the Kif power Balls. The media can effectively lower ethylene gas readings in storage areas from 75,000 to 150,000 cubic feet, depending on the commodities being stored. In larger rooms more machines can be used, it can also be proven to kill molds, rots, bacteria and remove odors.