Limestone is a wonderful addition to your isopod habitat. It’s a great long-lasting alternative to cuttlebone or eggshells. Limestone gives your isopods a much-needed source of calcium while doubling as a hiding place. Especially Cubaris species will appreciate a source of limestone, a they are typically found roaming limestone caves and cliffs. This Our limestone pieces can add a creative, contrasting, and functional element to your Isopod Lodge!