Micro bubble problem

I'm setting up a tank I bought from a friend. It's a Red Sea max 130 plug and play system. I bought a new skimmer pump and turned on the skimmer. What was clear display before is now filled with micro bubbles. There is a baffle between skimmer section and return section but it's obviously not enough to keep out the bubbles. There is room for media in the baffle. Not sure if there is something I could put there to screen the bubbles. Current sponge filter isn't working.