Looks like a lot of flow. Fish have any issues with it so high without having much rock?
That video is in my frag tank........main tank is similar. Fish have no problems..........the pumps all have wide flow or I have their outputs bouncing off each other or the tank walls.
Whenever I see less extension I know my pumps need cleaning. The Jaebo pumps need cleaning at least once a month.

Rommels Watermelon 073017
pink shortcake 070917
tierra del fuego
shades of fall 081517
red gecko 081617