Does a 10G Aquarium Need Skimmer? Powerhead?

[4lti7ude]

Hey, Im currently setting up my first salt water aquarium and I was wondering if I need a protein skimmer on this?

I only want a clown fish and a few with some anemones.

Right now the 10 Gallon is running a 50Gallon Aqua Clear Filter on the Lowest Flow Rate, and the filter is on the left side of the aquarium.

I was also wondering if I would need a Small power head for the anemones or what not.
If so how strong of a power head.

Thanks.