Mysterious Tiny White Worms..

[Sir Guppy]

Ok, I found a free 100 gallon. I put some plant substrate I got from someone. I finished pouring water in it today, and found these things squirming around in it!
View attachment 341363

 

[MattW]

Link isn't working for me is it an image or video?

 

[Sir Guppy]

Image. I’ll try sending a second:

 

[MattW]

To me it looks like detritus worms because of how thin they look.

example ↓

edit - when I set up my last tank I occasionally saw them swimming around until fish were added.

 

[Sir Guppy]

Alright, thanks!
Are they one of the good bugs or bad ones?

 

[MattW]

Alright, thanks!
Are they one of the good bugs or bad ones?

I've never had any issues with them. I believe their numbers can be dwindled by reducing feeding amounts and having thinner substrates

 

[sharkweek178]

Alright, thanks!
Are they one of the good bugs or bad ones?

They're a sign of overfeeding.
They won't harm your fish. They're in nore danger of being eaten by your fish.

 

[Sir Guppy]

No fish in the aquarium yet. Just finished pouring in the water today.