[Reliable Materials: Our creative fish tank boxes are made of safe resin materials that are safe do not harm your fish or aquatic plants and look very realistic Fun Design: Our treasure chest opens and closes with a steady flow of bubbles which rise and fall to reveal the treasure inside Refined Appearance: The design is refined and the tank decoration enhances the visual appeal and provides a hiding place for your small fish Easy to Clean: The resin material used in this aquarium treasure box focuses on stability no special maintenance requirements easy to clean Safe Used: It provides relaxing decorations for your fish provides a sense of environment and enough fun for you and your fish and is a good fit for decorations]