I placed this link in your fish discussion however I did not highlight it. It is a link to a pdf named The IBC of Aquaponics. A single document rich with ideas for IBC's and 200 Litre Blue Barrels.
Great news Angela. I've only kept Jade Perch in aquaponics. I have found them easy to raise and great to taste.
You and Colin are welcome to visit and have a look at my set up, anytime you like.
I had a Kindy thing on... ended up loosing the car to Tash and not making it anyway. The pictures show a great day and great gardens. I look forward to your next GV or a visit over there with Phil maybe.
Angela - I agree with Rob. Silver perch seem to be picky eaters. We are just a touch cold for Barra.
I started with 25 Jade Perch fingerlings. Two years later, I found I'd only lost two fingerlings. I may have eaten 5 more, but that's not death by aquaponic/natural causes. And, they taste really good!
Home built 1000L tank Angela. You'll find you can mostly only get little guys.