Robin,
1) Are the 2 bulkheads on the left of the sump the actual return pumps? if so, put an elbow onto the end of them facing them and drill holes on the lower portion of the elbow bending it down to the bottom of the sump.
2) I would wrap the fuge drain around the front of he fuge to have it drop into the sump behind the filter sock (not into it)
3) I would increase the volume of water in the sump by 2-4" this will give you more leway when it comes to bubbles disbursing and rising.
4) I would put some rubble between the filer sock and the return pump inlets.
Hope that helps,
House