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Originally Posted by tkhawaja
In general, does providing a strong water flow channel through the length of the tank help by providing tangs a more "vigorous" swim?
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Yes IME it does two things. If the powerhead is within a foot of the surface it provides highly oxygenated water which many tangs love.
Like reef said, my observations are that they love to play in it. I do not know if they are exercising.