After almost two weeks rocks are starting to get this gold/brown stuff on them is this normal? Also noticed that a small bug decided to commit suicide in the tank yesterday.. Figured it would have got filtered but, to my surprise still floating on top of water.. Is my version of a skimmer not right? And last one I also noticed pictured at bottom what looks like a brown looking grass growing on one of the rocks.. like 5 little 1/8 inch arms.. I tried to get a close up but, kind of blurry...


