Yes. I would gove it at least 750 an hour. It will skim much better if you give it more 'dirty' water. My becketts are 1 1/2 or 2 turns probably but each is different and you have to find the right combination that works for you.
Open the gate valve all the way, adjust the ball valve to get the flow where you want it, then close the gate till the water level is where you want it. Open the becketts a little at a time and give it a few hours after every adjustement.