I have a really nice 12 inch plus male odoe pike in my 125g. I can get hold of a 10 -12 inch female at a very reasonable price. Two large odoes in a 125 bad idea right?
I'd do it without hesitation.
Might toss them in a smaller tank together first though, to remove the established one's dominance as I'd assume the one with home field advantage would be territorial.
Do you have a back-up tank in case?
Plan to quarantine before adding?
Matt