First it's your going to need 4 full time pellet feeders in there, tossing in pounds and pounds of food daily, now its insects will be fine. You have no idea if crawdads are even present, for that matter, none of us know anything at this point. As soon as he said we are not using pellets that changed everything?
I have only fished and eaten kokanee, trout, steelhead and salmon for 40 years now. Extensively. We have a very large, or had until the Stanford lawsuit, planting program for hatchery trout. They are pellet fed, except for maybe a lone bug that falls in thier concrete lined troughs. They are planted everywhere. You pay to play, hook them with any color power bait and they almost rollover and die from the shock. They do not fight at all, and taste like pellets. This much I know. To the point I refused to fish for them any longer. Some of the lakes even have thier own hatcheries like Lake Amador. The trout are just substandard. They either get caught in three days, starve and float up or become LMB food. They just are not equipped to handle the competition for food when the pellets are instantly cutoff.
The bigger the trout, the longer it has been fed pellets the stupider it is. and once they get over 12 inches, they want bigger prey including fish. They even have studies in Utah of trout populations suffering badly when native minnows were displaced by spined fish. And what to they plant to eat the Chubs? Good old trout. The State of Utah, they should know what eats what.
The reason I said should have got triploids is they don't waste what little food they get trying to reproduce in a Lake that they will not be able to. Without forage fish the food chain is broke. It's a trout pond with no pellets. If you think these fish are going to add bulk and grow out on a diet of whatever might be present that is merely wishful thinking.
