A substrate barrier and drainage layer is strongly recommended when making a bioactive rainforest enclosure to keep excessive water from sitting in the substrate. 
 
This substrate is recommended for Amazon Milk Frog, Blue Tongue Skink, Chahoua Gecko, Chinese Cave Gecko, Chinese Water Dragon, Chubby Frog, Crested Gecko, Emerald Swift, Madagascar Day Gecko, Mantells, Fire Belly Toad, Fire Skink, Gargoyle Gecko, Gold Dust Day Gecko, Green Anole, Green Iguana, Green Tree Python, Horned Frog, Leachianus Gecko, Madagascar Day Gecko, Mantella, Monkey Tail Skink,  Leaf Tail Gecko, Panther Chameleon, Pink Toed Tarantula, Rainbow Boa, Red Eyed Crocodile Skink, Red Eyed Tree Frog, Red Foot Tortoise, Red Tail Boa Constrictor, Rhino Iguana, Tegu, Tokay Gecko, Tomato Frog, Veiled Chameleon, Vietnamese Mossy Frog, Whites Tree Frog and many more!