Medium bubbles: The air stone cylinders produce a good amount of dense bubbles. A great way to increase oxygen solubility in your aquarium and enliven aquatic life. Model: ASC-025; Spray volume: 0.8L/min; Standard air tube ID: 0.5cm. Driven by even 2W-4W nano air pumps. Suitable for use in small aquariums and fish tanks. Reliable Material: Made of mineral material and sintered at high temperature. Well-built and efficient for long-lasting service. No effect on the health of your lovely fishes. Stable and durable: each cylinder measures 1.5D x 2.5H (cm) and weighs 8g. And its cylindrical body always makes it sink to the bottom of your tank for even bubbles. Easy to use: fully soak the stone in water for 1 hour before use. Clean it regularly with a brush because it clogs after weeks or months of use.
