Just found a a new pair 2 of my ritkiels have paired up. i'm planning to move them to a separate 75 gallon. would it be ok if they were joined by my blood red severumn pair? i'll just put a divider between them once there are eggs?
No do not do this. This will definately end up bad from aggression and the overstocking factor. Get the new tank before the fish and then add them once everything is set.