Aponogeton Flower Stalk

I have an A. crispus that has put out an approximately 2 foot long flower stalk that I finally noticed last night (it is in a corner of the tank in bad need of some pruning!) So I lifted about a 3 inch segment of it out of the water and awoke to find it split and tiny little white flowers forming. My question is what to do next. I know (I think!) that the flowers won't self-pollinate and you can use a brush to spread the pollen around. But what about the seeds that form (hopefully)? If someone could provide some insight into propagation of this plant I would be most thankful. Also, I can rig my glass canopy to expose a lot more of the stalk--would this produce more flowers or does only the end of the stalk produce flowers? TIA