Hi I will set a bunch aside for 1 -2 weeks. I have 9 bar leopards and 14 bar leopard snake skins I will set a side a few of each.
Let me know asap if you change your mind.
I would try to use a smaller tank than 90 for just 6 2" discus. It could be fine but they have tendencies to feel more secure in a tighter surroundings.
I would keep 6 in a 29 gallon tank and as they grow move them up. But that is completely up to you.