A few deaths were expected, as they are feeders, but I was especially surprised by a couple males with red markings on their back. One had just one red spot, and the other had a group of little red spots, pictured below.
Without flash:

With flash:

After a head count the next day, the one with the small red dot must have died and been eaten, along with another one somewhere along the way, but the one pictured was still alive, so I put him in a tupperware cup next to one of my isolated females (all my new females are in separate cups so they can drop their babies). However, he must have jumped out during the night... I've never had one do that before.
I found this thread on it viewtopic.php?f=2&t=2664&p=24392&hilit=red+spot#p24392 but it really doesn't help much. If it is bacterial, do you think the rest all have it and just aren't showing it yet? Is it in the water? Will my java moss infect others if I put it in another tank? How long should I quarentine them to see if they're okay? I even have babies from one of the new females... I hope they're be okay.