It was a decision I felt I needed to make for the well-being of all of my fish, and the tanks, not just these guys. These were originally in a community tank with other fish, had I moved out everyone they were picking on, it would have just left them in the tank with 3 otos, and my biological filter would have tanked. Overall, moving them to the already very stable, and cycled 20 gallon, by themselves, was a better decision for everyone. Plus, there wasn't any putting a bunch of fish into a tank at once, the only ones that were really moved were my three dojo loaches and some guppies. It was stress them, or stress all the other fish I had by playing musical tank swap lol
Bhead, I've never noticed any aggression between these guys at all. Even when I introduced the EBR to the tank, the GBR took to him immediately and they've been inseparable ever since. Honestly, they just tag team to keep their little area protected while getting ready to breed, but I've never seen an bickering between them. From what I've read though, I have weird fish since they're supposed to suck at parenting.
Quick question, I'm assuming that they will not lay eggs again until these guys are separated, right? The GBR is getting rather plump again.