Anyone know what these things are? I noticed several of them on my glass and the white oval one moves pretty fast. Should I be concerned?? After almost a year of running my tank seems like I’m seeing more tiny creatures that I have not noticed before. I saw a tiny worm thing swimming really fast when all the lights went out the other day, but haven’t seen it since. They other day I also saw two other things swimming on the surface of the water but I siphoned those out