+1 chance of microbubbles but this skimmer runs best at about 10" so might not get them. If you do, you can use an L or U elbow on the pump like this, so it pulls water from behind. fyi I also had the skimmer over hang into chamber 1. I'll find a pic if you don't understand.
Get a 10 gal tank or whatever and drill in an over flow at 10 inches for the skimmer to sit in. Then sit it on top of your sump for it to over flow into