The MTGHYARE 3Pcs Decaying Trunk Aquarium Decorations Betta Fish Ornament Freshwater Small Resin Log Fish Tank Landscape Wood with Holes Aquarium Hideout Caves Decoration is a great way to add some style to your aquarium. Made from natural resin and free of chemicals, this wood is safe for fish to swim in. With a variety of colors available, you can find the one that suits your needs.