100% AQUARIUM SAFE - 100% PH Neutral and completely safe for all freshwater aquarium fish, Cherry/Amano shrimp, and live plants. All stones are pre-washed and easy to clean – simply submerse, position and create a stunning hardscape! Unlike natural stone, it will not break apart, leach or cloud water. Chemically neutral, will not alter pH or water chemistry. SEIRYU STONE DECORATION - Seiryu Stone is undeniably one of the most popular hardscape stones used in aquascaping. Often used in Iwagumi aquascapes, it’s deep silver-gray color and rough jagged texture creates an amazing focal point in any aquarium. Originally from Japan, natural Seiryu Stones are now illegal to export. Our molded stones are handcrafted with the deep crevices, cuts, and texture of natural stone. MOLDED ROCK - Sculpted from actual hand-selected stones, our Seiryu Stones feature the same sharp edges, detailed crevices and deep cuts found in natural stone, making them perfect for creative ledges, rock cliffs and underwater mountains. LIGHTWEIGHT AND SIMPLE - Hand-selected by our professional aquascaper, our stone collections are lightweight perfect for Iwagumi and Amano style aquascapes, biotopes and rock gardens. SIMPLE TRANQUILITY - Seiryu Stones are often the focal point of Iwagumi aquascapes and embody a theme of minimalism and harmony. Fish and plants are added to bring balance and life to the aquascape and often used minimally. The deep crevices and rough texture of each stone creates excellent anchor points for mosses and plants. Seiryu Stone is undeniably one of the most popular hardscape stones used in aquascaping. Often used in Iwagumi aquascapes, it’s deep silver-gray color and rough jagged texture makes them an amazing focal point in any aquarium. Sculpted from actual hand selected stones, our molded Seiryu Stones feature the same sharp edges, detailed crevices and deep cuts found in natural stone, making them perfect for creative ledges, rock cliffs and underwater mountains.