What are these little bugs crawling on refugium surface?

[hugafish]

Hi, I am totally new here but not new to fish keeping. I am sorry to make my first post about a problem I am having. I have a DIY refugium above my 55 gallon freshwater fish tank. I have a muslin cloth hanging from the outflow holes and this cloth has gathered various plants, slime and bacteria sort of acting like a "Bio wheel" if you will. I am not sure what to call all of this stuff. ANYWAY there are these little, tiny, light greenish white bugs crawling around all over the surface of this cloth. I just noticed them today. I did my very best to get a close up shot of them. Do you have any idea what they are? Thank you!!

 

[mr.bigglesworth]

Hi, I am totally new here but not new to fish keeping. I am sorry to make my first post about a problem I am having. I have a DIY refugium above my 55 gallon freshwater fish tank. I have a muslin cloth hanging from the outflow holes and this cloth has gathered various plants, slime and bacteria sort of acting like a "Bio wheel" if you will. I am not sure what to call all of this stuff. ANYWAY there are these little, tiny, light greenish white bugs crawling around all over the surface of this cloth. I just noticed them today. I did my very best to get a close up shot of them. Do you have any idea what they are? Thank you!!

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I have no idea but those kinda look like termites to me?

 

[hugafish]

I have no idea but those kinda look like termites to me?

That's funny because I thought the same thing! Anyway, after much research I figured out that they are aquatic springtails. They are harmless. Which is a huge relief.