Aquaneat 0.6/1/2 Inch Air Stone 12Pcs, Small Airstones Cylinder, Aerator Bubble Diffuser, Air Pump Accessories For Aquarium, Nano Fish Tank, Hydroponics (2 Inch)

Widely applicable: Great for freshwater, saltwater/reef aquariums and hydroponic use; Increase oxygen levels, ‘blow off’ CO2 and raise pH; Can be easily driven by even nano air pumps Material: Durable and sturdy material; Safe to your fish Dimension: Fits standard airline tubing aquarium and CO2 tubing with inner diameter of 3/16′(4mm) Note: You have to soak it in water for about 30 minutes before connecting to an air pump to run it Includes: 12 pieces of gray air stones