EZ Flo Automatic Fertilization System - 2 Gallon Non-electric, maintenance-free fertilization system encourages root growth and drought resistance Fill the UV treated tank and set the dial - Feed through hose end sprayers, sprinklers, or drip systems Installs at hose bib or directly to 1/2 inch or larger tubing Works with wet or dry water soluble fertilizers, as well as fungicides, herbicides, pesticides, etc. Flow range: 2.5 gph and higher, Required psi: 5 min/60 max, Ratios dial in from 50:1 to 2000:1