Fundamental diference is the oxygen transfer efficiency of the method of injection. Any O2 injection - either Venturi or High-Pressure has a low oxygen transfer capacity. Typically less than 50% at best. With a nanobubble generator, we convert that bulk gas into nanobubbles - since the nanobubbles do not rise, you retain almost all of the oxygen you inject. If you are injecting micro bubbles, most of the gas rises to the surface and is lost.
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