The complex is a large molecule but to filter it out the question becomes how fine a filter medium do you need. Some type of millipore filter medium might work.
I agree; however DE filters can handle about 5 microns, what else can handle a better level of filtering and not cause pressure issues (obviously using only your pool equipment)

The main problem would most likely be cost since quite a lot would probably be required to filter a pool!
Cost is, to me, a deal breaker. I was looking for alternative methods to negate that factor. I think that, providing it works, that I can build this for a (relatively) small cost and it can be re-used.