For Orchids - Clay Pebbles porous structure provides excellent aeration and acts as a water reservoir.
100g Clay Pebbles Hydroponic Expanded Rocks
This natural clay is mined, formed into pellets, then kiln fired at high temperatures to cause the clay to expand into tough, lightweight balls. Clay naturally has balanced capillary action, with an ideal surface structure. Theexpanded clay is semi-porous and generally does not float like