Habistat Coir Coarse Husk is a compressed block of coarse coconut substrate for species of wetlands. It is 100% natural, organic and from sustainable sources. Biodegradable, non -toxic, non -abrasive. Gets wet quickly and holds water without flowing. In use: Place the block in a container or bucket and add 3 liters of lukewarm water. Let stand for 1 hour for coconut fiber to grow 8 times. Complete with more water if necessary. Ph 5.4-6.8