I think you are on the right track when you say a more efficient method of aquaculture. We will do everything we can to reduce the levels of pollutants in the system. The major pollutant we are seeing (and this is a BAD one) is mercury. It isn't in large quantity, but it is there. We also see TBT in very limited quantity, but those are very spotty encounters. Microbial contaminants include Vibrios and Enterococcus, but those are easily dealt with given the right equimpent. You mention biomagnification and bioaccumulation. Those are problems that will have to be dealt with if and when they arise.
I assure you that there is no offense taken. I realize that this sounds far fetched, but we honestly believe that it can be done. The first run will be experimental. We will need to establish water flow and lighting requirements. It may take a while, but if we can pull this off, it will be well worth the efforts we expend in doing so.
"If you don't fish, you should..."