My skimmer is good, lighting is 3-65W PC on a 25 Gallon, and the only thing I can think of is that we transferred them from my neighbors tank to mine, so maybe that is it. I did do a water change then, three days ago, but maybe I will do one again. I wonder if when I added my calcium/buffer I burnt them, would that do it? Crap, hope I didn't do that!