I have an unusual situation. I have a 55 gallon tank converted to a sump, and it is all tempered glass. I have a iwaki 70 external pump that I want to use with this. The partitions in the sump are made of plate glass so they can be drilled. I was wondering if I could plumb a bulkhead near the bottom of the plate glass on the return side to create a constant siphon. here is a poor drawing to give you an idea.