Welcome to R2R. I have 30g. I used. PH 400 from LPS and a CoralLife protein skimmer also. Both working wonderfully. My skimmer is HOB and moves also of water also. Does that help?
Look into a Jebao WP-10 for a budget controllable powerhead or a Koralia 425 Nano. I use 2 of the 425s on a wave controller but will upgrade to the Jebao later. As for a skimmer I use a Hydor Slim Skim Nano in my JBJ 30G but it barely skims much to be worth it. The tank stays fairly clean with just the live rock for filtration. Weekly or bi weekly water changes is enough to keep the tank parameters in line.