Alder cones serve dual purposes in bioactive enclosures: they create sheltered microhabitats where isopods and springtails establish colonies and forage naturally, while simultaneously enriching your substrate as they gradually decompose and release nutrients. This slow breakdown encourages the detritivore activity essential to a functioning cleanup crew ecosystem, promoting the instinctive behaviors—burrowing, exploring, and feeding—that keep your vivarium inhabitants engaged and thriving.