Back last year i got sick and tired of having worked up the Vegepatch to a perfect condition only to then become to tied up in other projects or work to maintain the patch and spray/ water and weed.
So i got the tanks up and running and rushed out and got 50 silver perch from SEQ Fish http://www.seqfish.com.au/ took them home and within 3 days they all died!!
Why did they die, because i was an over eager idiot. I have kept fish for years and know better and should have put in some cheap feeder goldfish, built up the nitrogen cycle and made sure the tank was running... but i didn't.
After 3 weeks of having goldfish in the tank the plants started to grow nicely and now i have small red claw growing out in each of the IBC's rather than silver perch and the system is running perfectly.