Protein Skimmer Help

[orthoboy]

I need a good protein skimmer for my 20g nano tank. I was debating between the CPR biopak or the Prizm. Any suggestions and advice?

 

[orthoboy]

Someone has to have some good advice?

 

[flatzboy]

definately go with the bakpak. I have one and they are fairly cheap and work wonderful I use it over a 20g. to!

 

[viper_930]

CPR Bakpak. I use it in my tank and it is awsome.

 

[rbaby]

Here's a newbie question:
What's a protein skimmer? Is it necessary? What's it for? I only have the regular Eclipse filter in there...
Dumb question probably =P but it'd teach me a thing or two =D...