Little Shrimp Like Bugs in my Filter????

[joschac2]

I changed my filter cartridge today and noticed Shrimp like creatures living in the filter.... Any thoughts of what theses things are? How did I get them? Are they bad for the tank? This is a fresh water tank.

 

[leggey]

Any pics ?

 

[Mumma.of.two]

This will help you ID
http://www.planetinverts.com/what_is_that_bug_in_my_aquarium.html

 

[joschac2]

well according to the link you sent me they look like the Copepod.. Im glad there harmless.. just wondering how they showed up...