:help: I have a 30 gallon tank, gravel botton, several articial plants, power filter, and heater sset at 70 degrees. I have (had) 7 Gold White Clouds, 6 bloodfin tetras, 1 small pleco, and 1 cory cat. Over the last 8 or 9 days, I have lost 1 White Cloud every 2-3 days. I'm down to 4 left. No problems with the Bloodfins. I didn't find corpses for the first two White Clouds, but I did find some remains of the third one on the filter inlet screen... Any ideas? I'm at a loss to explain it... 