hygger Aquarium Air Stone, Fish Tank Bubbler, Nano Furnace Flue Round Stone Disk, Small Bubbles and High Dissolved Oxygen, with 2 Suction Cups, 1 Adjust Valve, 1 Check Valve (2 Inch)

Sturdy & Smooth Our white Nano disc air stone is made of high-quality white alundum & brown alumina, fired at a high temperature of 1300 degrees Celsius.

The air diffuser area is very smooth and exquisite, not like other poor quality air stone touch rough.

Super sturdy & durable, service life can be 2 to 3 years.

Ultra-high Dissolved Oxygen This upgraded hygger air stone releases the bubbles more smaller, denser, uniform, which makes double oxygen dissolving rate in water.