So there i was, getting ready to turn off the light in my 5 gal invert tank, when I noticed some thread like things on the side of the glass. At first I thought it was on the outside and grabbed a rag and some cleaner. When it didnt come off, i decided to take a closer look. Low and behold, there are little thread like worm things in there. So, heres the question. What are they and how do I get rid of them? Are they something to worry about? Thanks in advance!