I am slowly working towards creating my Discus tank - and have finalized a lot ideas I had for it. Now my questions concerns the amount of Discus I can add at a time in the tank. I have a 33 gallon tank and planning on putting 4-5 2.5/3 inch discus in it (then shift them to a 55 gallon). Given the social nature of the fish and not wanting to affect the water balances - can I add 2 fish at a time? I don't want them to be too upset or bully a third one. I realize they are picky fish and really want to try my best to give them a new healthy home. Thanx!