From FrugalReef

Pods is short for copepods and amphipods. They are the little white bugs in your aquarium. They are a good sign of a healthy system. They are food for many marine fish. They can be purchased online, but often hitchhike on live rock.

[edit] See Also

• A good online source of copepod cultures: http://www.oceanpods.com/
• An article on breeding copepods in culture: http://www.advancedaquarist.com/issues/feb2003/breeder2.htm
• http://saltaquarium.about.com/cs/pestscopepods/a/aa061200.htm