Before use, simply rinse the aquarium tunnel with clean water to ensure it's ready to enhance your fish tank's aesthetic and functionality. Crafted from resin, the aquarium cave is, fade-resistant, and maintains its shape even with long-term submersion in water. Natural rock-like texture and earthy tones of the aquarium tunnel mimic real underwater landscapes, seamlessly blending into any fish tank's ecosystem. The corner tunnel design of the fish tank hideout creates a secure enclosed space ideal for shrimp, small plecos, and bottom-dwelling fish to hide and breed. The fish tank cave sinks quickly and stays firmly on the aquarium bottom, providing stable shelter without shifting during water changes.