Air Stone Disc: Size: 5.2" D x 0.8" T. The air stone disc is well-constructed for continual bubbling. Ideal for oxygenation in fish tanks, DWC systems or small ponds. Medium Bubbles: The air stone produces an abundant cascade of dense bubbles. A great way to increase oxygen solubility in your aquarium and enliven the aquatic lives. Steady Output: Jetting volume: 16 L/min; Recommended pump power: > 7 W; Standard ID airline tubing: 3/16". Efficient bubbler for constant air diffusion, keeping your fish or roots growing healthily. Stable in Water: The bubbler weighs 11.3 oz which makes it sink to the bottom quickly. It always lies steadily in the water without moving easily when bubbling. Easy to Use: Soak the stone completely in water for 1 hour before use. Clean it regularly with a brush as it gets clogged after weeks or months of usage. An airstone, whose purpose is to gradually diffuse air into the tank and provide oxygen for fish to breathe, is a necessity to have around your aquarium if you are a lover of aquatic animals.