Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
If they're not moving around, they're tube worms, which are harmless. I believe there are more down in the right of the pic. If they do move around then I'd say you may have a problem. Hard to tell from the pic. How long has the tank been up? Water parameters? What's on the rock above the frag? Looks algal in nature, to me.

