Filter, Skimmer, or Powerhead?

[yaboynosey]

My current system is a 13 gallon nano with an Aqueon Quietflow 10 (100 gph) and a Hydor Koralia Nano 425. My tank has only been stocked for 2 weeks, but I'm definitely noticing some dead spots where a lot of food is building up. My single powerhead is unable to stop this from happening. So my question is: should I get a $50 hang on skimmer, a pico powerhead rated for 160 gph, or a filter with a higher flow rate? Thanks

 

[E048]

A powerhead and a skimmer