I'm always surprised to see people recommending a pellet fly for stocked fish
I use to work at the state hatchery and the trout there are conditioned to respond to the sound of hundreds of pellets being broadcast into the water..... not one individual pellet.
Part of my job was running the state pay-to fish ponds
I kept a bag of pellets in my office so that I could 'chum' for kids that were having trouble
I'd throw out a handful and have the kid cast their fly into the middle of the frenzy. Not a pellet fly either but a regular dry, wet, or nymph.
The fish never responded to a single pellet being tossed in. It was always the sound of many raining down.