Show me where I said the White River "caught" didymo. You can't because I didn't, but you almost certainly will try. If you are going to try to tell me I said something, make darn sure it is what I said. For example, when your body is primed for infection, it takes less of the bacteria or virus, whichever it is, to cause a successful infection, correct? This is the same way with the river system and didymo. When water temperatures were higher, as they were pre-dam, the river is almost impervious to a coldwater organism regardless of how much of the substance is placed in the river. If the water temperature had nothing to do with it, why is there no didymo in ANY stretch of river holding predominantly smallmouth? Simple, the conditions are not right.
It is shady because the state knows they are going to rake in the taxes from everyone who gives a darn buying rubber soled boots rather than nursing their old felts through another year. Don't think that the money had nothing to do with this.