*Another thing to add Sorry.*
Type of tank
1) For me i'll just make the tank simple by doing it bare. its also easier to maintain rather than to have a planted tank
2)if u really wan to introduce discus to your planted tank, they will also look nice. but only disadvantage is the the tank is more difficult to maintain.
Tankmates for discus
1)Discus are cichlids and all cichlids are terrortorial so its best to keep a only discus tank.
Temperament of discus
1)Discus will maybe chase other discus or other fishes in your tank. that is normal.
2)It is good if u keep a group of discus of the same size as when they feed, the bigger discus may chase away the smaller ones and the smaller ones will not get a chance to eat.
Regards,
HuttShun