Personally I don't know much about discus but I wouldn't go for it, discus require a large tank. even though they are small discus they still need a lot of space to move around in. if you think that the tank is bigger enough then go for it but my personal opinion is no.
hope that helped
I am considering ordering some discus on line and the only open tank I have to use for quarantine is a 29 gallon. Their final home would be my 125 gallon community tank. I just don't want to add them in there without quarantine. I was thinking it was too small and just wanted to confirm it. I guess I will just have to wait until another tank opens up.