At some point on the appointed day, the truck with the silver boxes on it will show up, back down close to the water, toss in a 6" hard hose, and open up a couple of compartments.
If you're there to see it happen, you'll see a couple of hundred to a thousand panicked, disoriented shiny fish race around like they've done lost their minds. (They have!! The poor rascals have gone from a protected concrete raceway, to a dark box that jostled them all about, to an open body of water where strangers are trying to eat them.)
If you get lucky, within about an hour, you should start seeing fish caught. From then until about a week, sometimes 2 weeks, you should still be able to catch a few fish.
Kirk
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"In every fight, there has to be a winner and a loser. Unless it's a draw."
Jim Lampley, HBO Boxing