If you ask me, I'd say don't do it. Sorry to be a downer, but all these people make good points. Here's my little story: I bought 3 small (3-4cm) discus ages ago when I knew nothing about them (chucked them in planted tank, expecting them to grow) doing prob 1 week 20-30% water changes, so not the best. Anyway, they didn't grow and just ended up dying after a few months, so i bought some knew ones (as you do), chucked them in the planted and what do you know, I didn't see any change in size whatsoever. Now I have recently bought 5 small discus, 1 large, and two small ones from my planted (kinda stunted). So I've chucked them into a 135L bare bottom with a potted plant (to look nice, and soaks up extra ammonia) and have done 50% water changes every day..what do you know, i get amazing growth, discus colouring up amazingly, nice red eyes..they run to the front of the tank as soon as I come in the door for food!
If you give them bare bottom (in my opinion) they will love you more.