Air Stones: It's The Bubbles, Not The Surface Agitation

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Pawfly 1.6" Air Stone Bubble for Aquarium Fish Tank Hydroponics:
Tetra Whisper Air Pump for Aquariums:
This video discusses how a air stone facilitates better gas exchange, but not by moving water to the surface. It's the bubbles in the tank that are making the most impact.

Air Stone,Surface Agitation,Aquarium Aeration,Gas Exchange,Aquarium,Fish Tank,Fish Keeping,Aquarium Hobby,