1. Naturalistic Curved Design for Immersive HabitatCrafted with a smooth, organic curve, this tunnel mimics natural underwater caves, providing fish and shrimp a secure hiding spot. The dual openings (front/back) encourage exploration while promoting healthy circulation, reducing stress in community tanks.2. Heavy-Duty Resin Construction for Long-Term DurabilityMade from non-toxic, aquarium-safe resin, this tunnel resists fading, cracking, or leaching harmful chemicals into water. Its weighted base ensures stability under gravel, preventing floating or shifting during tank maintenance or fish activity.3. Versatile Size & Gravel-Friendly IntegrationDesigned to fit seamlessly beneath 3–5cm of substrate, the tunnel’s flat base distributes weight evenly, avoiding pressure points on delicate aquatic plants. Its spacious interior (15cm diameter) accommodates small fish, shrimp, or fry, while the open-top design allows easy viewing and cleaning.DescriptionElevate your aquarium’s aesthetic and functionality with this Underground Tunnel! Its natural curve creates a dynamic underwater landscape, encouraging fish to swim through and explore. The dual entrances promote natural behavior, while the sturdy resin material ensures safety for all inhabitants. Perfect for freshwater or saltwater setups, it blends effortlessly with gravel or sand substrates. Note: Rinse thoroughly before adding to the tank to remove dust. Ideal for creating a stimulating, stress-free environment for your aquatic pets!