For skimmers, it doesn't matter which skimmers you have, you have to play around and adjust them quite a bit before they are stable. With the more experiences people, they can judge the water level, the air amount that the skimmer pull in and the amount of dirt in the water and they set and adjust the skimmer accordingly. As you are new to this hobby, don't expect to buy something and set once and forget about it, you will be disappointed. A new tank with few fishes doesn't need skimmer right away, you can get away with just water change. So save up the money and buy the skimmer that you want.