For your first attempt.......B+.
You definitely need a larger pump and more bioconversion(filtration). The addition of a skimmer is a given. Without one, you will soon have a Muck Pit.
Keep in mind that the primary function of a pond is to support life and should be constructed to provide the optimum conditions for creating a healthy, self-sustaining eco-system. Sadly, many contractors overlook or de-emphasize this basic fact.
"Everybody is ignorant, only on different subjects." - Will Rogers