The Cavity Stones are particularly well-suited for creating hiding spots and natural shelters tailored to the needs of the animals. Since they are hardly distinguishable from real stones, the hole stone replicas ensure an almost natural underwater landscape. They are ideal for designing aquariums, but also for creating rock structures in terrariums. Hiding places can also be easily created thanks to the porous structure. The extremely lightweight material, in contrast to natural stones, prevents damage to the glass of the aquarium or terrarium. Made from a safe and inert material (polyresin), they have no impact on water quality or clarity.