Re: Use a bubbler or not with no CO2 Zapins statement is correct: the benefit of an air stone is no greater than that of having some slight surface disturbance due to water returning from the filter. The water surface of the tank is far greater than the surface area of the bubbles, and has the added benefit of always being there to transfer gases to and from the water. The airstone also causes water currents in the tank, which prevent a stagnant layer of oxygen rich water from existing at the surface, with oxygen depleted water below. But, with the right water circulation in the tank, from the filter and/or powerheads, that isn't a problem either. |