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MATERIAL: Crafted from quality mineral material and sintered at high temperatures for exceptional durability, safe performance in any tank. VERSATILE COMPATIBILITY: Perfect for freshwater and saltwater aquariums, DWC hydroponic systems, and small ponds, working efficiently with even low-power nano air pumps. BOOST OXYGEN LEVELS: Delivers a consistent stream of ultra-fine bubbles to increase oxygen solubility, ensuring a vibrant and healthy aquatic environment for your fish. STABLE CYLINDRICAL DESIGN: The weighted 1.5cm x 2.5cm body ensures the stone sinks reliably to the bottom, providing steady aeration without drifting or floating. SIMPLE MAINTENANCE: Soak for 1 hour before first use for optimal bubble flow. Includes 10 stones compatible with standard 4mm airline tubing for easy replacement.