Volcanic stone

Crushed volcanic stone from the production of Madinah Al Munawarah factories, weight of the bag 1.5 kilograms, bag capacity 3 liters, size of the stone similar to a green olive, approximately one piece. It is used at the bottom of the container to prevent clogging of water drainage holes, used in hydroponics, mixed with soil, contains nutrients for plants, works on storing elements and water.