This sturdy breeding cave, made of high-quality polyresin, provides a safe haven for your fish during the breeding season and helps reduce stress. The durable material is completely non-toxic and won't disrupt the biological balance of your aquarium. The decoration adds a natural touch to your aquarium. It offers the perfect space for spawning and protects the young fish. The clever design allows you to easily place the cave against the aquarium glass, so you can look inside without disturbing the fish. Suitable for cichlids, guppies, and other fish that need a quiet place. This decoration can be used in both freshwater and saltwater aquariums. Instructions: Carefully remove the decoration from the packaging and rinse it with warm water. Note: Do not use soap, all-purpose cleaners, or other cleaning agents (such as hydrogen peroxide, thinner, or turpentine).