I just got 2 wild discus from a guy who had them for sell and he seemed to know what he was doing. But he said they had been converted off ro water onto our water. Im wondering if you have to do this with all discus? My wife really likes these two we have so were planning on ordering more. But I need to find out who to order from, what to get how to get them on our water because I wont be running an r o unit. I have kept rays pbass and alot of other fish but from what I hear discus are a whole new game. Any help would be great thanks