HabiStat Orchid Bark Substrate consists of natural bark chips. A versatile substrate that can be used wet or dry; spray with water daily to create high humidities, or keep dry for an arid environment. Suitable for most reptiles, amphibians and invertebrates. Directions for Use: Spread substrate evenly across vivarium base ensuring a depth of 2" (5cm). Do not overfill if using underfloor heating. Spot clean as required and replace regularly. 2025 Update: Habistat now offer a single grade of orchid bark which closely resembles the previous fine grade.