[AWolf]

I haven't worked with this 10g tank in a month, so it's growing stuff. All fish are out. I see these skinny little brown worms about 1/2 inch long, They don't look like larvae. There are about 6 of them maybe, that I can see. You can see one of them; upper left of the yellow dot near center of the photo. Detritus Worms.

 

[AquaAurora]

Detrius worms are harmless. Fish will eat them, they sometimes hitchhike over on live plants, they'll go away when you keep a clean tank.