OR!!!!
go buy a bog hog air stone from mojo at OBD, along with the alita air pump he uses,
and then use the existing pump inlet hole to accomodate a rubber o ring and put a pvc 1/2" nipple on it for a feed pump.
you would also want to put an elbow or a 45' facing up on the skimmer interior so the feed water didnt just go out the exit.
you'll have to dial it back, as that combination is 2400lph of air injection(good enough for a 400g), but you can adjust the air pump.
you will only be limited by the volume of the skimmer body, but it should be super easy to dial in the right power on the air pump.
then just use a maxijet 1200 for a feed pump.
done and done!