Then a few weeks later I was out and about and was offered a IBC with the top cut off. (I.e. without the top !) for 30$AUD. Could not resist a second change to set up a new system. So now I am the proud owner of a IBC without any system, or place to put it. Just could not resist the potential, possible, maybe, outside chance to build a new system.
For added encouragement. I also got support from AB Aquaponics who kindly send me some drawings of his system. So watch this spot over next few weeks. And I visited the Gladstone Fish Hatchery which breeds Baramundi fingerlings. Should be some available in October. Plenty of time to continue to collect bits and pieces.