Microbubbles Taking Over Tank - Classic 2000 HOB Skimmer

I’ve just setup my new HOB 2000 skimmer, and the microbubbles are overtaking the tank.
I’ve read and watched all the of the setup guides on this skimmer so I’m pretty sure it’s setup correctly.
I know that it’s supposed to take some time to break-in, but the overflow is just pouring foam and microbubbles into the 90deg elbow and draining directly into my tank.

I just setup my new 125 gallon about 5 days ago, and the skimmer last night.
I used 120lbs of new Caribsea Ocean Direct Live Sand, 160lbs of new Natures Ocean Coral Base rock.
I put 8oz of Dr. Tims One And Only, also 8oz of API Quick Start, along with dosing Ammonium Chloride a few days ago.

Is there anything that can be done to adjust this?