Natural stone anchors help your plants stay where you want them! Our stone weights are the functional, handmade décor for aquascapes and landscapes, including igwami, Dutch, nano and nature aquariums, animal vivariums, and plant terrariums. These anchors are the perfect addition to any tank or enclosure and a safe decoration for fish, crustaceans, reptiles or amphibians, including betta fish, cichlids, shrimp, snails, geckos, lizards, and snakes.