Atami B'Cuzz Hydromix HP, 3.8 Cubic Feet B'Cuzz Hydro mix HP is a "high porosity" professional growing medium formulated for the serious grower The lightweight and high porosity of B'Cuzz Hydro mix HP provides conditions necessary to establish plant growth These characteristics make B'Cuzz Hydro mix HP ideal for use with water sensitive crops, propagation of plant cuttings, and/or low-light conditions