Grodan Rockwool Macro Plugs Round w/Slit GP3 Grow Set your desired humidity level

Set your desired humidity level and the controller will activate and deactivate humidifying and dehumidifying equipment appropriately

Always add pH adjusters to water

Chamois for cleaning your conductivity probe

) 11 Height (in

Simple-to-Use DIN Type Bracket for Easy Installation

Grodan Rockwool Macro Plugs Round w/Slit GP3 Grow Set your desired humidity levelMacroPlugs are 1. 5 in round with a slit that allows easy insertion of a cutting. These loose round plugs fit perfectly into the Gro Block hole. For best results, always insert MacroPlugs in a tray with individual cells. The individual cell will make sure the plug stays closed around the stem of your cutting.