Great update Jeff! See if you can come back in 2 weeks with some unique ribbon catcher ideas. If you have some larger plastic pipe sections, maybe something T shaped, some 5 gallon buckets with holes in the side oriented upright, or 5 gallon bucket laying on its side half submerged with water, some artificial bulrush or reed shaped items. I'm curious if given the choice between structure, cavities, leafy or sandy bottoms, natural vegetation, or tree tops/branches, which do they pick and why?
Your experience with FHM is like mine. Before predators they go crazy, one season later, they are gone. I only have a few panfish and perch, no predators and they still were gone. I think the perch have been feasting in your pond