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【Efficient Oxygenation for Aquatic Environments】These aquarium air stones produce a steady stream of fine, dense bubbles to improve water circulation and increase dissolved oxygen levels. They help create a healthier environment for fish, shrimp and aquatic plants in tanks, ponds and small water containers. 【Premium Safe Mineral Material Construction】Made from high-quality mineral materials and processed through high-temperature sintering, these air stones are durable, stable and safe for aquatic use. They are designed for long-term performance without affecting the health of fish or plants. 【Compact Size with Powerful Bubble Output】Measuring approximately 2.5cm, these small air stones are ideal for aquariums and tanks where space is limited. Their porous structure helps generate uniform bubbles while taking up minimal room inside your aquatic setup. 【Wide Application for Fish Tanks and Ponds】Suitable for freshwater aquariums, marine tanks, koi ponds, breeding tanks and other aeration systems. These bubble diffusers work with compatible air pumps to provide essential oxygen for various aquatic species and plants. 【Reusable and Easy to Maintain】Designed for repeated use, these air stones can be cleaned when necessary to help maintain effective bubble production. Their stable weight allows them to stay at the bottom of the tank, providing consistent aeration without floating.