m0useanswered grow question 3 years ago Do you have a lot of fungus gnats?
They look like fungus gnat larva or some other small bug.... its an infestation and I would treat it.
Get yourself some Neem oil or just soap and water. spray em down and let it soak in for a few min before flushing though.
Can also use beneficial nematodes.. microscopic worms that eat the larva.
one product is called Pod Poppers.
https://www.amazon.ca/Nema-Globe-Beneficial-Nematodes-S-Feltiae/dp/B01N5TYSFU
Best Of Luck!