30 Gallon Filter and Skimmer

[UTSAltwaterEnthusiast]

Do yall think i should have Filter and Skimmer? I have a fluval 205 that is connected but not running yet. I bought a cheap Visi-Jet Protein Skimmer but im regretting it since i hear its pretty much worthless (dont ask me why i bought it, thought it was going to be better than *nothing*). What yall think i should do? Trying to avoiding spending 70-100 for a skimmer even though i know it will be worth it in the long run.

Edit: Might return Visi-Jet for Aquatic Life Internal Mini Protein Skimmer. any success with these? I have read better reviews.