So here's a picture of my sump. As you can see the refugium is packed. Also the skimmer is growing a lot of coralline algae on it so I have to find some black acrylic to shade it. But the algae isn't really affecting the performance.
And here is a upclose shot of the skimmer. You can see some bubbles coming out but it's not much and none of it gets to the tank because of the baffles. Also the bubbles area result of the output of the pump which is tremendous. I am really impressed with these atman pumps. I had really wanted a sicce but after seeing this pump work I am no longer envious of sicce powered skimmers.