Trout are a great fish for an aquaponic system, especially in temperate or cooler climates. Trout grow quickly but need to be monitored and cared for attentively, as they primarily feed on fish in nature and will cannibalize if the right conditions are not met.
One of the biggest concerncs when raising trout is the oxygen saturation of the water, with 5.5mg/L being the bare minimum. Any less air than this and the tout will cannibalise. They grow quickly and need to be fed readily, lest they cannibalize.