Hey, im the one that had the trouble with the two fish dieing and the amonia going really high, im looking at my tank and i dont know why, but there seems to be this dust all over the place, no really on the rocks below, but on the live rock and heater, there seems to be dust, easiest way to explain it is the asbestos and all grey **** that fell with the two towers, kinda like that. What is it? I also see that the algea from the floor has disappeared. Getting one step closer each day to shutting her down :\