Made from sturdy, ABS plastic, this fish tank hideout remains and colorfast after long-term water immersion, ensuring safety for all aquatic inhabitants. This betta tunnel's ladder-style openings allow easy access between substrate levels, letting your aquatic pets move freely while providing discrete hiding spots. The natural-looking underground aquarium cave seamlessly blends into your fish tank environment, enhancing the landscape's depth and visual appeal. Aquarium cave features a unique stepped tunnel design that easily embeds into substrate, multi-layered hiding and exploring spaces for shrimp and small fish. Simple to set up: Place the fish tank cave on your tank bottom, cover with gravel (leaving openings exposed), and rinse with clean water before first use for optimal results.