Grodan Rockwool Macro Plugs Round w/Slit GP3 Grow Oligochitosan may be described as

Oligochitosan may be described as a nano-molecule of chitosan

Simple-to-Use DIN Type Bracket for Easy Installation

supports the plant’s resistance to disease and stress and promotes its inner and outer strength

Chamois for cleaning your conductivity probe

but you can also get timer boxes that control the lights with total security

Grodan Rockwool Macro Plugs Round w/Slit GP3 Grow Oligochitosan may be described asMacroPlugs 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.