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My background is in saltwater aquariums and coral farming. Oxygenation of the water is also crucial and we generally look for more oxygen exchange with movement of the water at the surface. A protein skimmer works by creating intense micro bubbles in a chamber that floats waste up and out. This is done with a water pump with a Venturi (air injection into pump impeller) but waste removal only works in saltwater because of the increased surface tension. A MaxiJet powerhead with a Venturi is...
Venturi vs. air stones observation.
Venturi vs. air stones observation.
from Hydroponics / Aeroponics https://www.rollitup.org/t/venturi-vs-air-stones-observation.1015226/