Fish love the Penn Plax Terraces Style 3 Aquarium Décor. It"s true. They love to swim around it and under until they just have to take a rest behind it. You"ll like it, too, because its rich detail makes it a great addition to any aquarium. Crafted of non-toxic reason. * Made of non-toxic and fish-safe resin * Designed for both fresh and salt water aquariums * Will not alter the water chemistry * Perfect addition to your aquarium * Dimensions: 11.5L x 5W x 8H in.