Hi,

That sounds like a great sized tank for discus. The general rule of thumb is 10 gallons per adult discus. If you were to get a group of 6-8 juves, with ample filtration I dont see a problem.

Make sure that you cycle your tank properly before adding fish though. Most people are so impatient to get fish in their tank, it normally kills them and they give the discus a bad name for being hard to keep.

I suggest a fishless cycle, using pure ammonia to get things going.

good luck

Hollowman