Monkfield Coco Fibre Brick is 100% organic, compressed, coconut husk fibre. Coco Fibre Brick is an expandable reptile substrate that once soaked in water becomes a moist bedding for reptiles and amphibians requiring relative levels of humidity. The dry brick expands to produce approximately 9 litres of substrate. Heat sterilised, the Coco Fibre Brick is free of fungus and germs. Available in a 650g brick. Directions for Use: Place the brick in a bucket and add 3-4 Litres of water. Leave to stand for 30 minutes and mix well.