Tiny but durable: Each ball measures 2 x 1.8 cm (D x H) and weighs 8.5 g. Tiny but well built for continuous bubbling. Ideal for small aquariums or aquariums. Medium bubbles: The air stone balls produce a good amount of dense bubbles. A great way to increase oxygen solubility in your aquarium and enliven aquatic life. Jet Volume: 1L/min; Recommended air pump power: 2W - 4W; Standard ID Air Hose: 0.5cm. Efficient bubblers for long time service. Reliable Material: Made of mineral material and sintered at high temperature, it does not cause any effect to your aquatic health. Help your fish grow healthily. Easy to use: completely 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.
