In the terrarium and aquarium world, birch cones can have several uses. They are often valued for their decorative appearance and can serve as hiding places or natural features in terrariums and aquariums. Additionally, they can help create a more natural environment for animals, providing surfaces for the colonization of beneficial microorganisms. Birch cones can also release substances that promote water quality, although they are less commonly used for this purpose than alder or pine cones.