The Penn Plax Bonsai Tree on Rocks (style two) is designed for both fresh and saltwater tanks. The decoration has a rock formation and a bonsai tree with beautiful green branches that can serve as a hiding spot for smaller fish. The ornament measures 7"L x 6“W x 12"H and is made of non-toxic, fish safe resin. Add the Penn Plax Bonsai Tree on Rocks to your Aquarium! Combine with other Penn Plax Ornaments and Decorations (sold separately) for a custom look.