I've kept three angels total, right now I am down to only one...but the other two were wiped out by a parasite or possibly the "Angel AIDS" that was talked about earlier, the third one did not die and is still very happy so I'm guessing it had developed immunity. I kept my angels in a tank with some glow lite tetras that I think do move around quite fast, but it hasn't bothered the angels. Also, my PH is very high, about 8.4ish, and the angels were acclimated for about 15 minutes...I just put the bag with the fish into the tank, then put about five table spoons of water into the bag every 5 minutes. My angels don't eat any food that's not floating on the surface. In fact, I have seen them swimming toward a flake floating on the surface, before they got to the flake, it sunk a little, they did a fast U-turn and went for the floating flake next to it. I keep my water about 79ish with all fake plants...but lots of it. This is my first time keeping angels, and when I got them, they were a millimeter larger than a half dollar, from top fin to bottom fin. I've had them for less than three months and now the surviving angel is about three inches from top fin to bottom fin. The angels that passed away due to disease were also that big. Just for reference...I got my angels from a store called Jack's Aquarium, which I think are only available in three or four other states in the north east...I currently live in Ohio.