Odd tang behaviour...

[naesco]

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?

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.