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Compared to traditional powerheads and wavemakers, based on propeller nozzle technology, the latest gyre generator is based on 'crossflow' technology.
Wavemakers excel at making waves. While waves are spectacular to watch in motion, they are in-fact moving the majority of the water vertically up and down, with relatively low horizontal movement, especially near the bottom of the aquarium. In comparison, gyre generators are superb at moving sheer flows of water from one side of an aquarium to the other, furthermore the sheer flow of water is so strong that it bounces back from the other side of the aquarium to achieve full circulation within an aquarium, and so generating 'gyre flows'. The illustration, right, shows the a traditional wave maker, water movement towards the bottom is very minimal.
So, in summary, Gyre generators excel in moving sheer flow of water from one side of the aquarium to the other side. The sheer flow of water is so strong, that it would bounce back from the other side of the aquarium to achieve full circulation within an aquarium. ie. generating "gyre flows".