RAH makes the only good argument in the entire thread. At least he does not say The Frog is wrong because we say so. Water movement is a huge factor. That is how the farmers in San Juaquin keep farming, they drain the subsurface water out and put it into salinization ponds. Other choice, retire the land and make it a salinization pond.
UD Davis folks are not wrong, neither is the water quality expert, but the Frog always is here as of late. Would I ever show up to a customer's pond with some homemade concoction called weed killer? Of course not. I would use gly, like always, like I already said.
