I am able to catch about 70% of the trout each spring. The rest perish, at least I presume that, and have only seen one float in all that time. As temps rise, the trout definitely go deeper, seldom coming to the surface to feed. In the spring, they are feeding at the surface and hammer the bait/lures. As it approaches mid July, they are about done for and in the deepest/coolest water. You definitely have to fish differently for them then. They do not hammer it like when surface feeding, at least in my pond. However, you can catch them, but expect it to be way different in approach.

Are tilapia legal/available to stock for you?