The most common air stone used in hydroponics is the 'Golf Ball Airstone'
Roughly 50mm in diameter - the golf ball air stone is suitable for most situations
Can be attached with 4mm or 6mm tubing, with the special dual inlet connector
Provides ample oxygen and water movement
Releases a constant stream of fine small bubbles
Intended to be used with an air pump, check valve and airline tubing
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