First welcome to AC....next what are the water parameters of the tank...what will be your waterchange ritual. What other kinds of fish would you keeping w/ the discus, what kinds of food will you be keeping them. First your tank needs to be fully cycled before you think of putting discus in there...they are sensitive to ammonia, and nitrites especially. They prefer rather soft water, and can be kept in neutral to slightly basic water (7.0-7.6), but prefer more acidic water if you're planning on breeding them(5.0-6.0). Waterchanges need to be on average two 50-75% weekly. Water temp needs to be in the range of about 80-86. Tank mates need to be small and not pushy or fast moving as this will stress the discus out and cause them not to eat (cory catfish are excellet and most tetras are okay), but IMO (in my opinion) i prefer to keep them in a species only tank. Are you going planted or not? If no plants then may i suggest bare bottom for the simple fact that it is much easier to clean and get all the debris out that will cause ammonia build-up. I typically feed a wide variety of foods to my discus, from frozen brineshrimp, mysis, and beef heart to a high quality pellet food. I might also suggest keeping medication on hand for when you need it. Discus are prone to get certain types of parasite due to the slightest of stress. In a 6 ft tank you can keep more than 6 discus if you wanted, but keep in mind that they need about 10 gal (40L) of water per adult discus. Good Luck and let us know how things go, hope this helps some...i'm no expert but I have been keeping discus for a little over a year now with some success, there are many people on here that have been keeping them a lot longer than I...maybe they will respond with some added information for you.