Cecil, regarding the fish turning black, I wonder what would happen if you put them in a container, closed the lid and kept it dark for a few hours, then dosed them? Would they turn dark or would they stay lighter in color?
Good question. Going to have to do some experimenting.
I did have a prof at Lincoln University in Missouri tell me they dipped their pond fish in saltwater strength water, before adding them to heir indoor tanks, to kill external parasites, but didn't remove them until they turned white (I remove them when they turm on their sides).
Maybe salt is the answer?
