They can be very sensitive and need to be in groups to thrive I lost an adult this week because it was upset about the tank change from being moved from it's home of 5 years, perfect water parameters and lots of room, and evn though I know quite a bit and have done much reading and talked with keepers of these specific 2 fish and "discus in general, I found out too late that they can be ultra sensitive.
After talking with the lfs owner, he described a situation about these fish where a customer of his with no expense spared and keeping in perfect conditions (about 12 in a 150G) all of a sudden turned black, stopped eating, after a consult by phone could determine no reason the fish would be ill. Went to the house and after an examination and retesting were perplexed with no presentation of illness.
Then there was some pounding noise on the roof. Discus keeper was having his roof replaced. The fish were upset by the unfamiliar noise. after the next day the roofers job was complete.
No more pounding Discus returned to a normal color and eating and all was well.
Very sensitive. The lfs owner said especially psycologically. How that is I am not sure I really understand yet.
You can try what you want, but these are advanced care fish. Perhaps an advanced aquarist will purchase the fish you are thinking of.
Personally I am stunned and unsettled by my situation I have just experienced. Thought I would share my bad and surprising event.