Mystery...larvae?

[carriej]

Hi Folks,

I went downstairs tonight and there are hundreds of white larvae of some kind in my tank. They move and look like shrimp, but I don't have any shrimp that I'm aware of. Only invert is a few hermits. They kinda free fall and then scurry around. They are -everywhere-.

They have visible eyeballs. About the size of mosquito larvae. My camera is too crappy to take a picture. They have legs too. They swim by like pinching themselves (thin the way misquito larvae move) but they kinda use their legs too.

Definitely not pods or anything like that. Way too big.

Any ideas?