I'm not portraying them as difficult to care for, I wouldn't know since I have never had my own. I'm goin by what others tell me. I am aware of proper care requirements for angels, which all in all are just as easy as any other common aquarium fish, its the fact that the majority of people in my area who fail are the ones who don't understand proper fish care for any species let alone angels. I was merely speculating that since the water in my area is pretty much the exact opposite of that of which is found in the natural habitat of the angels, that this fact may contribute to the stress of angels in a tank with poor conditions.