Ravengate and I brainstorm back and forth a lot. We tend to build off each others ideas.
It should make sense because the fanning of the eggs runs water over them to deliver oxygen and hold off fungus.
A sterile sponge filter in a sterile tank draws the water over the eggs like "mom" and should do the same thing.
If it works like we hope it does, it should provide a way for hobbyests to save clutches of expensive shrimp when mom passes away berried. Jaime had the opportunity to put this into effect, so I- along with everyone else- am waiting anxiously to find out what happens and congratulate her if it works!