The Hamiledyi Aquarium Driftwood Fish Tank Cave Betta Log with Moss Resin Tree Trunk Aquarium Ornament Decoration is a beautiful and unique piece of decor that can be used in any aquarium. Made of authentic natural resin, this log is durable and non-toxic. It can be put in either fresh or salt water, and it makes a great addition to any aquarium. The log provides a beautiful and colorful decoration for your aquarium, and it also serves as a great hiding place for fish. It’s easy to maintain and requires minimal responsibility from you.