Catappa Leaves (10 Leaves)Dried Catappa Leaves (Terminalia catappa). Also known as Indian Almond Leaves, these are among the most widely used natural botanicals for aquariums and terrariums. In aquariums, Catappa leaves slowly release beneficial tannins and humic acids that help condition the water and support the health of fish and shrimp. In terrariums and paludariums, they serve as a durable, natural leaf litter layer that supports humidity and shelter for small creatures.