Before use, simply rinse the aquarium tunnel with clean water to ensure it's ready to enhance your fish tank's aesthetic and functionality. The fish tank cave sinks quickly and stays firmly on the aquarium bottom, providing stable shelter without shifting during water changes. 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. Crafted from resin, the aquarium cave is, fade-resistant, and maintains its shape even with long-term submersion in water.