would you risk leaving them overnight?

[Squid]

I tried removing the divider from my 2 arowanas, as the partition is gettng too small with my rays on the other side .
what do you guys think? would you guys try to leave them overnight?
or should i separate them for now. if it doesn't work i will put one of the reds back into my pond.

YouTube Video

so far have noticed fights not that violent. but since they are really big , a little nervous.