Just giving my situation for you. Just set up my third tank in house a simple set up very similar to yours. I have my pump just like yours on all the time. Since the power filter is providing surface break I just point mine straight across the tank. Helps keep waste suspended for filter to pick up. Don’t worry about clowns they find quiet spots very easily. My one clown loves swimming in the current when awake. That pump is not big so their is plenty of quiet spots for them to rest.! Looks great!

It will take some experimenting to dial in the flow but there is substantial leeway. This goes for the fish right now. Pay attention to their behavior. They will move into the flow they like. Just make sure they have a choice. It helps to know where they live in the wild.

