so full disclosure this is not my tank. i had it on my computer and i posted it thinking it was local. i could not place it so i cheated and looked at the tag on the picture "Glencarlyn Park, Arlington Va." it was something my son texted me.What fish and livestock are in it? Have you done any sampling or collecting there?
the river here is different. the temperature was cool when i waded across it today, there is a lot of algae, something is eating the CUC, there are empty mussel shells everywhere and i am pretty sure most of the fish have Ich.