Fred, that is a subject (and potential business) that fascinates me too. I did quite a lot of research into the various small scale fish-farming methods...combined with growing ornamental (in the rest of the world) aquatic plants. Perhaps vegetables too.

You know, the water alone from your pond will be rich in nutrients for your veggies etc. So all you need is a watering can to give them a boost, before considering more sophicated

Another couple of years and I'll probably be giving it a go in the Phils.