This is a must read: http://www.simplydiscus.com/forum/showt ... hp?t=28937. There, daily water changes are highly recommended, and wiping down the sides of the tank and filters daily, as well as starting with 6-10 juveniles from a reputable breeder. That website I must say scared me in to not getting discus for a while, but once you have them they're not that hard. But they do love clean conditions and lots of attention. I think they also love a natural planted environment where they know they can hide if they need to. I've compromised with my barebottom discus tanks and have excess plants from my heavily planted 4 ft community tank weighted down in them. This also helps keep the water free of toxins.
It is much easier to observe and treat diseases in a BB (barebottom) tank. At SimplyDiscus.com they all pretty much say they don't use gravel in their tanks because it can harbour diseases, it reduces water quality, and can allow nitrate buildup (growth limiting). They say discus appreciate water quality over planted tanks, they might be right but who knows. In saying that the last time I tested my heavily planted tank for nitrate it was 0ppm (not registering) because the plants used it all. So i'm going to try putting some juvenile discus in and see how they grow, will be an interesting experiment. Oh and most well maintained tanks housing healthy fish won't have any problems with diseases either. I recommend at least a 50% water change per week.
If you don't have a lot of plants you can just buy some planted poster paper that you stick on the back of the tank to give the illusion it is planted.
Some nice planted discus tanks: http://www.simplydiscus.com/forum/showt ... hp?t=36137
A nice BB example:
http://www.simplydiscus.com/library/bre ... bxrt.shtml