Viagrow 11 lb. Coconut Coir Block Soilless Grow Media (222 - 11 lbs. brick pallet)Coconut coir bricks are composed of three different types of compressed coconut coir. This high quality, low sodium growing medium is an environmentally friendly alternative to sphagnum peat moss. When hydrated with water, CocoTek Bricks and Blocks rapidly expand which saves you time and effort. They can be exclusively used by themselves, blended together or mixed with expanded clay pellets, perlite or topsoil. The brick will break down on its own in