Hozon Brass Siphon Mixer with backflow preventer. The Hozon attaches between the hose and faucet. A suction tube is dropped into a bucket of soluble fertilizer which is drawn in, diluted and applied while you water. It's a simple and effective mechanism which has proved quite popular among growers. Water passing through the Hozon device will create a suction, drawing the fertilizer solution into the water stream at a rate of approximately one part fertilizer to 16 parts water.