Acacia leaves , from trees of the genus Acacia , are used in terrariums and aquariums to enrich soil, maintain humidity, and promote plant growth. As they decompose, they contribute to the growth of beneficial microorganisms, improving the health of the terrarium ecosystem. Some reptile and insect species may also consume these leaves, adding a source of nutrition to the habitat. Acacia leaves are therefore an excellent choice for creating a natural and healthy environment. They are available in an 8.5" x 12" hanging cello pack.