I dont have a pic and I am not even sure if I got a good look but a week after adding a clean up crew from saltwaterfish.com I found a small 2inch maybe a quarter inch wide brown sea slug at the base of a rock before it disapeared...it definitely was not a bristleworm. My question is what is the chance that is is deadly? Also if it diea and nukes the tank will it be bad because I do not run carbon or do water changes?
