Gumball Pods , from Liquidambar styraciflua (American Sweetgum), are spiny woody capsules used in aquariums and terrariums. Rich in tannins, they help acidify water and promote the development of biofilms beneficial to invertebrates. In terrariums, they serve as natural hiding places, support for microorganisms, and enrichment for certain insects. Their unique appearance adds an aesthetic touch to bioactive habitats.