What are 1/2 inch "walking threads" in my substrate? Have seen two.

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GrannyBecky

Aquarium Advice Newbie
Joined
Nov 13, 2016
Messages
9
Location
eastern N Carolina
I am a newbie, I have community tank with fish, snails and shrimp. Today I noticed 1/2 inch skinny things (like walking threads) in substrate. What are these? Are they bad?
 
welcome to AA

as for the creepy crawlers I wouldn't worry about them to much . one of your fish will make a good snack of them,
 
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