>>2533333Depends on a lot of factors, such as the water temperature, actual size of the pond, how recently they were stocked, etc.
My experience with stocked trout cooped up in small pools and ponds is that you often have to try everything and the kitchen sink to get them to bite, and will be lucky if they actually do. I've fished pools so clear that I could watch every single trout and what it was doing. What they typically do is ignore (or turn to watch go by) every dry fly, wet fly, streamer, nymph, caddis, spinner, spoon, salmon egg, Trout Magnet, grub, worm, etc. Doesn't matter how thin the leader, whether or not a sinker and/or bobber are used, etc.
Whereas I can dip the tiniest Trout Magnet or a very tiny fly into a seam that I know contains a brookie, twitch it once, and then I have a brookie on the line. Brookies make sense: know where to go and where they'll likely be, avoid spooking them, ease a fly or plastic grub or something into their cone of vision, twitch, catch.
Best I can tell you with farm trout trapped in a barrel is to try everything. Probably live nightcrawlers would be best. My best theory is that farm trout mostly choose to starve while waiting around for trout chow. I've considered buying some trout chow and tying that on, but that hardly seems sporting.
Picrel, two of four stocked trout I caught out of a crystal-clear pool with my buddy last fall. We split them up. It took four hours to catch them using every conceivable technique, lure, and bait, and I don't remember which ones they randomly bit on because it all ran together after a while.