uh-oh ID please?

tmfreak

New member
I am cycling my tank and I notice tons and tons of yellow and green trasluent worms.. they are about 1 mm and are move sort of rapidly. does anyone know what it could be?
 
they are 1mm long, sorry my camera cant zoom in on such a tiny thing. they seem to do well with all the copepods running around them...
 
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