Insects, spiders and other invertebrates need the right conditions to thrive, Creature Soil is the ideal habitat substrate to meet their needs. This unique blend will make them feel right at home as you add live plants, rocks and decor items to create your own unique miniature world. Zoo Meds Creatures Creature soil is a proprietary blend of natural materials including Peat Moss, Soil, Sand & Carbon. Ideal for spiders (including tarantulas), insects and other invertebrates. Increases humidity and promotes natural burrowing behaviors. Great for live plants.