The tank was a little low this morning, so I pumped in some water from the water change barrel. The white fish ate, but I didn't see the little fish. I ran my hand along the bottom of the tank and found a dead fish and a thumbtack. I saw another rather rough looking fish in the tank, not dead. I think the tank has the white fish (healthy or nearly so) the little fish (getting better) and the rough looking fish. The white fish took some pellets this morning and this afternoon, so that is good. I could be mistaken, but I think the plants look a little better too.
Time for more patience.
Tomorrow I'll do a water quality panel on both tanks and see how things (chemically) are doing.
I hate patience.