HofM & No: 1 son did not end up coming to blows despite different opinions on the set-up.
To date - we have 110 Jade Perch fingerlings in this tank supplying nutrients (I hope) to the above tank that is now holding herbs, lettuce & other veggies.
This is a second set-up - no fish in this tank yet - so we have to add nutrients to the water. The netting is to keep the possums away from all our plants.
Two bathtubs hold lots of plants - everything is still looking healthy - so fingers crossed!
It's outside my shed - but I have always loved the sound of running water - so all is good.