ok, ive had 2 small angels in a comnity tank for aboout a week, and now they are acting funny, one just sits near the top, looks like it always feding, and comes down, swims around for 2 seconds, and then goes back to the top, the ohter one seems to be swimming a bit better, but, its bottom fins seem to be arching back, almost looks like it has elbows, both fish seem to be moving with the current of the water when they are sitting there. the only other agreessive fih i have in there are jellybean tetras (or popsicle tetras) i owned one angelfish before, and it was from a bad stock, died the day it got home, along with all the stock at the fish store, but, before it died, it semed to have the "elbows" and the tail fin, seemed to have "shrunk" but as of now, neither of the current angels have that prblem. as of now, the angel wiht the "elbows" still eats, but the other angel doesnt. any suggestionns?