Wow - spectacular.
Are you finding all the filtering, sterilizing, and cleaning of the water to be difficult? This is what a swimming pool should be like - biological and mechanical filtration without all the chemicals used in a typical pool. Do you all swim in the pool often?
I think your choice to not add much fish stock is a good one. Your desire for clean, clear swimming water and a large biological fish load would be difficult to mesh.
One thing I found very interesting as I read through the thread is your ability to change plans and build as you saw fit. It appears that you do not have to submit plans, get permits, pass inspections, etc. as would have to be done elsewhere (the states) - true?
As you look back - are there any major things that you would have done differently?