It is an eco friendly product made from the husks of coconuts and can be safely composted or recycled into potted plants or gardens. Ideal for naturalistic terrarium type set ups incorporation reptiles, amphibians or invertebrates. Use it damp for tropical species as it naturally absorbs and breaks down odor and waste product. Add Eco Earth? loose coconut fiber substate on top of Zoo Med's Hydroballs? to create an ideal drainage layer for optimum plant growth, humidity and drainage in naturalistic terrariums.