Thanks for all the info and conversation Tynk. Some years ago I tried my
hand at pairing up mates and went so far as them laying a couple sets of
eggs on a piece of slate. After they were layed I put plants around it to
protect them from the parents eating them. I had an air stone placed to
give a gentle air circulation and the eggs died both times. I really tried
to sex the angels, read a bit on it, heard it was hard to accurately do. I
believe I had two females, even though one acted as the male in
"fertilizing" the eggs after they were laid. I didn't get the result I
wanted, but it was facinating to watch.

Do you find that the mates eventully turn on each other? Always happened
with mine. They would get along great for a long time having grown up
together, "mated" and then eventually they would fight horribly. Now I just
keep on angel in the tank.