Get to growing everything under the sun (even when the sun isn't out) with the Hydrofarm oxyClone 20-Site Recirculating Cloning System, a simple, compact, recirculating cloning system that allows you to grow all year round. With 20 growing sites, this kit includes an attached Venturi valve to draw in bubbles while the submersible pump delivers turbulence. You'll achieve maximum aeration with constant flow of dissolved oxygen through the 4-inch air diffuser, as well as less retained heat with evaporative cooling. Best of all, this system won't leak or clog. With this system, you can create more plants from your existing ones at little extra cost by taking cuttings and placing them in the kit. Grow more and take your hydroponics game to new levels with the Hydrofarm oxyClone 20-Site Recirculating Cloning System.