thanks for ur replies. all i know is we are all getting the heebie jeepies with this stuff in our tank. i just wonder where it came from as I didnt hagve it before, until i added 10lbs of gravel.
apparently they feed off food due to overfeeding, but in my case, what food are they feeding on since im cycling the tank?
I wonder if I have too much gravel in my tank, its about 60lbs so about 2.5" deep. i just want to understand how it happened.