The SLOCME Fish Tank Tree Trunk Decorations – Lifelike Hollow Tree Wood Ornament, Fish Can Swim Through The Trunk Hole is a great way to add some style and function to your fish tank. These decorations are made from high-quality, Environmentally friendly, durable, sturdy, and BPA-free resin, and they’re designed for both fresh and salt water aquariums. With these decorations, you’ll be able to create a truly immersive experience for your fish.