Thanks everybody for your input, but i'm gonna be out of Datnoids fish keeping for a while. What I had in the pictures is just some of the dead Datnoids. The other is just too depressing to post. I hand picked all of these myself and been collecting them for a while now. Time to move on I guess.
As far as the heaters goes, it was my fault to begin with. I should have put more than two heaters in the begin with. Both of my heaters went out at the same time and it was too cold in my basement.