Three angels have died today, no signs of damage, I just found them on their sides. They were eating fine, showed no signs of disease or bacterial infections etc. So I just don't get it. Any ideas? They were my leopard, golden marble, and marble, definately some of my best, and the rest I would rather not lose....help, any ideas? I have no water change equipment at the moment, so no I cannot check it. But my banjo, kuhli, and cory are all fine. I did a fifty percent change last week when I stirred the gravel...help?! I've had these for over six months, and it's really ticking me off to see them dying off one by one, I'm scared I'll wake up and my entire tank is dead.
well sounds like mine, long term nitrate exposure