Black worms in aquarium, please identify!!

I just found these guys today when feeding them. I removed all the ones that I saw on this tubing immediately after taking these pictures. They inch along, so they‘re definitely not planaria, and they‘re too fat to be detritus worms, too black to be bloodworms…and that‘s about as far as my aquarium worm knowledge goes. They‘re not leeches, right?

I don‘t think a template is needed for this, so I won‘t fill one out just yet. I do 40% water changes every two weeks and it‘s a 10 gallon tank. Just wanna know if I need to treat the tank!

Edit: Did some more digging, found some more, and got some better looks. I think they might be drain moth larvae…I think I would‘ve preferred leeches. How do I get rid of them?

 

I can't see clearly enough to tell if it's leeches or larvae. Either way, what fish, if any, do you keep there? Most of fish would eat that sort of thing (especially the larvae). If it's fishless or extra peaceful fish tank, maybe you could temporary move some more predatory fish there, to get rid of those (but obviously not so predatory that it eliminates your shrimp or whatever you keep there). If you don't have such fish, maybe you can borrow one from someone in a neighbourhood.

 

I‘ve got black skirt tetras, neon tetras, and shrimp in there (it‘s overstocked, I‘m working on it). I also have two bettas in their own respective tanks, but I don‘t think it‘s viable for me to introduce them or clear out my ten gallon. What other fish do you recommend?

 

Strange that tetras don't hunt the worms/larvae, they look small enough that even a tetra could eat it. Maybe just try not feeding this tank for a few days? Hungry fish might suddenly develop taste for the nasties.

 

That looks like a fly larva to me. Probably a kind of midge related to bloodworm. Not all are red like bloodworm.

They need somewhere to live and a food source. Remove either and voila!

Are they in the algae? Figure it out.

 

Yes, they‘re on algae and I‘ve spotted a few in my filter media. I‘ll hold off on feeding them and change out the filter, and once that‘s settled and it‘s time for a water change, I‘ll clean all the algae off my decorations. Thank you all, I‘ll keep you updated!

 

Alright, belated update! I had changed out the filter, thoroughly cleaned out the filter body and intake, and held off on feeding the tetras for two days. All the ones I could see disappeared and no more have shown up in the filter media since! Thanks a bunch for your help, very successful solution and no chemicals required