Recently acquired an Aquatop 40g AIO tank. It comes as a package and has a spot for a little protein skimmer. I bought it used with empty tank, pump and stand. Currently cycling it, needing up upgrade some parts and whatnot. My question is, do I need a protein skimmer for it? I don't plan on having fish, maybe a sand-sifting starfish, in addition to a clean up crew. Thanks!!

