Appears that the Iowa Fisheries Chief is talking in absolutes by saying "not be allowed under any condition". Before making such a strong statement, too bad the Iowa DNR can't approach it with an open mind and at least research/look at the other states that do allow Tilapia. Their decision doesn't totally surprise me though, especially considering the invasive species (zebra mussels, asian carp)that they are dealing with right now.
Brad-
I wrote back to Allen J regarding that exact perception. I also asked him if the Iowa DNR had ever discussed this with neighboring states that DO allow tilapia, to learn from their actual experience. I would have to defer to Bill Cody and others regarding his premise about algal blooms resulting from tilapia, but it seems a weak argument.