Weird Worm Like At Bottom Of Tank?

[goldfinger]

I've just seen three to four worm like wriggling red things gut says blood worms but where did they come from?
Tiny less than a micron in length any ideas?
Dont think they are frys just micro worms could have been off the bog wood I'll try and get pictures but they are tiny!
 

 

[goldfinger]

Think they were Midge larve, but fish have made short work and saw none this morning!
The tank is near the garden and open glass so guessing egg laying on the surface is possible.

 

[Mamashack]

Free and natural feeding! lol

 

[Skies]

I least they got a treat out of it