So this is really cool I think… lol. Tank is coming along great, everything thriving but over the last month and a half or so I noticed these white squiggly things on, we call it our favorite rock. Some kind of weird growth that has grown, multiplied and viola! I have these guys. Nothing I put in but cool as heck I think… look like feather dusters but too many although I did have one for awhile and it withered before I got my biodiversity up. ID help please. Very small, inch or so with small dusters out on the end