What Makes A Pool Fast?

From the Swimming World website...
By Devin Javens
Only swimmers know and understand the feeling of a fast pool. Something about the feeling can resemble that of euphoria, leaving you feeling as if you possess the swimming capabilities of Michael Phelps or Katie Ledecky. Swimmers constantly refer to pools as either fast or slow; however, what classifies a pool as one or the other? Is it just a feeling, or is there actual evidence to back up swimmers’ claims?