If you are planning to use an air pump and stones to deliver higher levels of oxygen directly into your hydroponics water tank or aquarium, you will need some air line tubing to connect them together for the air to travel through to the stone in the water.
This high quality clear silicon air line tubing is compatible to use with all makes of air pumps and stones.
When you are running several air stones from one main air pump, make sure to cut the air line tubing all to the same length, to ensure an equal flow of bubbles is delivered from each stone.