Theo,

My requirement, which I am willing to back up with money, is for an incremental system capable of supporting a minimum of 10 pounds of fish but expandable to support up to 100 pounds of fish. My personal target is for 50 pounds of fish right now, but will need more in the future.

The system must be relatively automated. It can rely on well water in copious amounts. It should have a reasonably small footprint and be capable of fitting in tractor sheds, chicken houses, etc. around the farm.

To answer your question on a typical 1 acre system...it would need to support 10 pounds of Tilapia over the winter.

Maybe we should offer a prize for the first successful system?

By the way, I can buy turn key systems all day for $2000...I'm looking for something which is a little more cost effective. There is no question that a market exists for such a product...Tilapia are selling for $10 per pound all over Texas now and most suppliers run out every year. It seems a few folks have finally caught on to the best pond management tool available today...Tilapia.