Cultilene Mini Cube is a cube – like loose substrate, made of StoneWool. Mini Cubes provide a perfect water buffer, with a very high water holding capacity. The water content in a pot of mini Cube is at a maximum of 85%. Not only are Mini Cube lightweight, they also provide large air-spaces, since there are always open spaces amongst the cubes. Mini Cube maintain their cubic shape throughout cultivation. Due to these features the substrate typically has an air-space volume of 30%, depending on the size and shape of the pot. This means that long irrigation cycles are possible without causing lack of oxygen to the roots.