Help me identify what this is? Mosquito Larvae?

[Ojan Mobedshahi]

Hi all,

I've got these guys clinging to my pipes in my system - I'm worried they are mosquito larvae, but i'm not sure, even under a microscope - trying to hone my ID skills. Whatever they are, I'm sure the fish are eating them if they are in the grow beds, but if they get sucked into the pipes and cling on they survive. I also have worms, snails, and gammarus in my system... and probably more, clearly.

Attaching 2 pictures, one actual size on a slide, and the other is 100x zoom thru a microscope.

Thanks!
Ojan

p.s. I wasn't sure what category to put this in, if you have a suggestion let me know I can repost it...