Do I need a Protein Skimmer??

[swimrnum1]

Hi evryone,
i was wondering if i would need a protein skimmer for my 20 gallon tank? its gonna be FOWLR There will be ls also.
as of now i am planning on getting:
1 black percula clown
1-2 purple firefish goby
1 clown goby
1 cc star
i am getting a really powerful filter that is supposed to be used for tanks up to 70 gallons so i will be getting plenty of filtration.
so my main question is ....will i need a protein skimmer? i might just try and go w/o one for a little while and see how my tank does without it but will i need one in the long run??
thanks alot (in advance hopefully!)
:happyfish :help:

 

[steveoutla]

I don't think it's absolutely necessary but it's always a good idea. If I were you I would use live rock as the main filtration in conjunction with a protien skimmer. If you get 1-2 lbs of live rock per gallon and put a skimmer on there you shouldn't need any other filter.