The Hailea Round Ceramic Air Stone is a 200mm disc of grey porous stone, surrounded on one side by solid plastic, the solid surround has rubber feet fitted to stop any vibration on the bottom of the tank.
An inlet connection is located on the border to allow 8mm airline to be attached to an air stone.
Once connected to an air pump, air will bubble out of the porous stone. Submerge the air stone so the tiny bubbles will mix with nutrient solution oxygenating it.
NOTE – Air stone requires 8mm airline and a high volume output air pump.