PumiceA porous light lava stone.With porous and light mass character, it is good at keeping water and air. So, it's usually used in bottom pebble and housetop virescence. We can also supply Zeolite, Magnesian Lime, Hydrated Lime, Organic Lime, Plant ash, Peat moss, Ceramic, Charcoal Ball, Expanded Perlite, Expanded Vermiculite, Rotten Leaves, Maifanshi, Cat Litter, feldspar, dolomite, argil, calcite, silica stone etc.