Magnolia leaves , from the Magnolia spp. , are used in terrariums to enrich bioactive soils, maintain moisture, and provide food for scavengers such as woodlice and springtails. Their thick, resilient texture allows for slow decomposition, promoting a stable environment. In aquariums, they release tannins, acidify the water, and offer antifungal and antibacterial properties. Their natural appearance makes them an excellent addition to bioactive habitats.