tropical-fish
Aquarium Advice Freak
We were thinking of just setting the tank up with a pair and adding a couple more later as we go, but the more I investigate the more it seems like they'd do better with all 4 right off the bat.
i read the same thing, that it's better to add all the discus at the same time. however you want to pick only the best discus and not to be buying fish just to make up numbers. if there are only 2 worthy discus at the lfs, then that's all i would buy.
i started off with 3. added another 2 after a few weeks and have a bit of space left for 1 or 2 more when i see the ones i want.