Little bug in planet aquarium?

[Cys aquatics]

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I was sitting at my desk and I saw these little bug like crawling on the bottom of my tank, any guess on what they are? They look like tiny little grey bugs with a bunch of legs

[Guppysnail]

There is a lot of micro fauna natural to aquariums. Is there any way you could take a picture?  It is rare that these are in any way harmful. Usually they make great live fish food. 

[Cys aquatics]

Ok ill try

 

 

 

[Widgets]

I think that looks like a scud. Beneficial to the tank by helping break down waste, and also a tasty snack for fish.

https://uwm.edu/field-station/scuds/

 

[Cys aquatics]

Ok thanks