I moved my breeding Jag pair 10' male 8" female (yes they have bred before) to my 90gal tank by themselves. When i got home from work today the male had beaten the crap outta the female. I put eggcrate between them but I'm not sure she's going to make it. Why did he turn on her like that? Will I have to keep them apart for good?

NOT But for you 10".