More bad news... The flasher wrasse died. Last night, I moved him to a tank with clean water and the first dose of Kanaplex. He swam very little, preferring to hide in a PVC tube. Very early this morning, I saw him almost lifeless and laying on his side, breathing rapidly. He looked near death, but I wasn't able to check on him again until about 5pm, when I found him dead.
I don't know how useful it is to examine the colors of a dead fish, especially not knowing how long ago it died, but he had normal coloring on one side, while the other side showed his flashing colors, along with a white patch near his gills that wasn't there the last time I saw him alive. Not sure what to make of it, if anything. It did not look like brook, and he had no other spots or discoloration. I suspect bacterial infection combined with way too much stress in a short time.
The red dragonet is the one fish I'm left with now. He doesn't move around a lot, but he does seem to be doing better than before. I dipped him properly yesterday, using 1 teaspoon of QC in 1 gallon of his water, for 30 minutes. He bobbed up a few times for air, but nothing too frantic. I also moved him to clean water with Kanaplex. I have tried to feed, but it's not going well. He won't move to catch any food, and he only eats one bite when it's in front of his face. I ordered bottles of pods from Live Aquaria, but even with expedited shipping, they won't get here till Tuesday. In the main tank, he did like other foods, so I will keep trying.