【100% Natural & Unique Aquascaping Stone】 Each piece of our Dragon Stone (Ohko Stone) is naturally formed, ensuring no two rocks are identical.When dry: It appears dark gray with white veining.When wet/submerged: It takes on a blackish-green or jet-black hue, where the white veins become more accentuated and exhibit a bluish sheen. Its striking texture, jagged edges, and earthy tones create breathtaking caves, cliffs, and landscapes in your aquascape, freshwater aquarium, shrimp tank, or paludarium. Perfect for Iwagumi style and other aquascaping layouts. 【Super Porous for Crystal Clear Water & Beneficial Bacteria】 The highly porous and craggy surface provides an enormous surface area for beneficial bacteria and nitrifying bacteria to colonize. This natural biological filtration helps break down fish waste, ammonia, and nitrites, promoting a healthy aquarium ecosystem and stable water parameters crucial for sensitive shrimp and fish. 【Aquarium Safe & Easy to Use - No Pre-Boiling Required】 Our stones are meticulously cleaned and are 100% aquarium safe. They will not alter PH levels or water hardness. While we recommend a quick rinse, their stability means minimal dust , saving you time. Ideal for aquarium substrate like aquarium soil or sand. 【Versatile Hardscape for Aquariums & Reptile Terrariums】 Beyond fish tank decorations, these rocks are perfect as terrarium rocks for reptile habitats, vivariums, frog tanks, and gecko enclosures. They provide natural hiding spots, climbing structures, and enhance the aesthetics of any reptile decor or amphibian tank. 【Naturally Unique Stones, Endless Aquarium Charm】 Each aquascaping stone is naturally formed, ensuring no two are alike. Sizes vary uniquely within a 3-9 inch range, meaning you might receive grand, statement pieces alongside smaller, intricate ones. Perfect for beginners, seasoned hobbyists, and professional aquascapers alike, these stones are designed to elevate the aesthetic of any terrarium or aquarium. They create an engaging and enriching environment for your fish, turtles, and reptiles, turning daily viewing into a continuous source of delight. Elevate your underwater world with our premium 20lb Seiryu Dragon Stone (Ohko Stone), the ultimate choice for discerning aquascapers and aquarium enthusiasts. Crafted by nature, each stone boasts a rugged, porous texture that not only creates stunning visual depth and dimension but also serves as a powerful biological filter. This natural filtration is essential for maintaining a thriving ecosystem, especially in crystal clear shrimp tanks or sensitive betta fish aquariums. Whether you're designing a serene Iwagumi layout, a complex nature aquarium, or a naturalistic terrarium for your reptiles, our Dragon Stone provides the perfect foundation. Its neutral composition ensures it is safe for all freshwater inhabitants and will not affect your water chemistry. 【IDEAL FOR】: Aquascaping, Freshwater Aquariums, Shrimp Tanks, Betta Tanks, Planted Tanks, Reptile Terrariums, Vivariums, Paludariums, and Zen Garden Decor. Order with confidence and transform your tank into a masterpiece today!