Mike, Mike, Mike,
I want you to seriously "think" about something here:
Dr J is educated in Vet. medicine. Most vet schools do not or have limited knwoledge concerning fish, there are other majors that specialize in this area (fisheries and wildlife biology as an example). I am not attempting to minimize Dr. J, vets not Dr. Js contributions. Yes, he wrote a very good koi health book, for its day. Those that have been around koi for awhile have some "issue" with Dr. J, but that isn't the point nor do I want to sidetrack from trhe point I want to make here.
Please think about something here, what about vet school teaches a prospective vet about koi (or even fish) environment? Medicine is about diagnosing and treating disease. There is nothing taught in vet school regarding design or engineering as it relates to structures nor flow dynamics. How about even filtration dynamics?
Now why, just because a vet (any vet) makes statements that are really outside of vetinary medicine would I listen? Perspective Mike, perspective.
Steve