You have shown no evidence of even the slightest knowledge of vessel systems; nor have you shown any evidence to support your claims. Why don't you prove all of the UAA engineers and myself wrong by giving us all an example of a marine system that meets all of the requirements listed in the article? Show us a marine system that endlessly recycles all of its water, but for the aforementioned 3 gal/day input. Your vague assertions carry no weight. Show us evidence.