Pawfly 4 Inch Air Stone Grey Mineral Bubble Stone Bar Diffuser Bubbler Airstones for Air Pump, Aquarium, and Fish Tank, 2 Pack
- standard ID airline tubing: 3/16 inch. Ideal for small fish tanks or aquariums..
- 2 Bubble Effects: Produce a cascade of fine bubbles under less air input and medium bubbles under strong input. Both form a rectangle bubble wall to increase oxygen level in your aquarium..
- Small but Enduring: Each bar measures 4" L x 1.5" W and weighs 1.2 oz. Come with an suction cup clip which keeps it lying steadily without floating in the water..
- Reliable Material: Compressed with sand and wrapped with a plastic base, it causes no effect to the health of your aquatics. Help keep your fish growing healthily..
- Easy to Use: Soak the stone completely in water for 1 hour before use. Clean them regularly with a brush as they get clogged after weeks or months of usage..