Ornamental fish can be used in
Aquaponic systems quite happily. We have used goldfish for our
small balcony kit and they survived wonderfully, the only issue we
had was that the fish tank we used allowed the fish to jump out so
had a couple of casualties.
Also use goldfish in the small
kit I have in my kitchen. They love the company of the busy kitchen
and I grow indoor plants in the five pots.
Photos are of goldfish and
aquaponic systems owned by Martin and Kerri