We had rainbows, now thinking maybe browns. But we need to figure out where they all went, whether it be 2 or 4 legged predators. Also the water temps concern me at 2 ft it was 73 to 77. The trouts prolly won't like that. We will try to check the deeper areas. Need a species that won't overpopulate a .6 acre pond. We thot we had that with the rainbows and the hybrid blue gill. Back to the drawing board.