Pawfly 2 Pcs Large Air Stones Cylinder, 4 X 2 Inch Aerator Bubble Diffuser For Ponds, Aquarium Or Fish Tank

Medium Bubbles: The air stones with micro holes generate abundant dense bubbles around the cylinders increasing oxygen and benefiting the aquatic life in your tank. Model: ASC100; Jetting volume: 5 L / min; Recommended air pump power: > 7 W; Fit for standard 3/16 inch ID tubing. Larger Size: These bubblers are 4 inches in length and 2 inches in diameter which is fit for multiple occasions like hydroponic systems ponds aquariums fish tanks etc. Stable in Water: Each cylinder weighs 0.8 lb which allows it to lie or stand steadily at the bottom of the tank when bubbling providing a stable bubble release space. Easy to Use: Soak it completely in water for 1 hour before use. Clean it with a brush as they get clogged after weeks or months of usage.