HabiStat Coir Coarse Husk is a compressed block of coarse coconut coir substrate for wetland species. It is 100% natural, organic, and sustainably sourced. Biodegradable, non-toxic, and non-abrasive. It soaks quickly and retains water without running. Instructions: Place the block in a container or bucket and add 3 liters of lukewarm water. Let it sit for 1 hour to allow the coconut fiber to expand 8 times its original size. Add more water if needed. pH 5.4-6.8