Galapagos 05270 Cholla Wood for Aquarium (3 Pack), 6", Natural Cholla Wood is dead, desert cactus wood that buffers aquarium waters! Use for Desert Terrariums OR Aquariums!!! Anchor Aquatic Plants, and Create a Focal Point for your Tank Great for Desert Snakes, Geckos, Bearded Dragons, Iguanas, and Chameleons Cholla wood is attracting for shrimps, lowering aquatic pH, and rooting aquatic plants