sorry dont got any pics or anything but one of my angelfish died just now, i suspected swim bladder disease cuz he was sinking, swimming upright and what not. i did a 50% water change, tested my water it was all regular. im sure it was something else though, i saw him not swimming good, about 4 hours later he was dead, all other fish in tank are fine. perhaps sum organ failure just curious as what could do this.