Enrichment of brine shrimp nauplii is the best way to help get dwarfs through to their full lifespan. They don't live long compared to their larger cousins so anything is going to help.
Newborn have egg sacks that are high in EPA but not much in the way of DHA that marine fish need.
Another problem is that they start consuming the egg sack immediately upon exiting the cyst, but they don't all hatch at the same time.
This means that the earlier hatch nauplii are already somewhat depleted by the time you add them to the dwarf tank.
Enrichment basically means feeding them something that will boost the nutrition levels for the seahorses.
As newly hatched brine have incomplete digestive systems, they cannot feed until they change to the second Instar stage where the digestive tract is complete. (for hobbyists, assume 24 hours)
Also, unlike their juvenile and adult versions, it takes much longer for them to be enriched.
12 hours will gut load their digestive tract, but two twelve hour stages with new water and new enrichment for each stage, will not only have them gut loaded, but by then they will have assimilated nutrients into their flesh, making them even better as dwarf food.
Some people use live phyto, but to get proper enrichment you would need multiple types of phyto to get a decent profile.
There are emulsions sold by Selco and Selcon that some use, but I prefer the powdered enrichment as it stores much longer than the emulsions do.
The best of these is as I mentioned, Dan's Feed from http:
www.seahorsesource.com/?wpsc_product_category=enrichments
Whatever you use, add it to water in a blender and blend for a minimum of two minutes to micronize the particle size so it's more appropriate for the nauplii to capture.
I store mine in a pop (soda) bottle in the fridge. Don't make more than you would use in a couple of days.
Add enrichment SPARINGLY as too much can wipe out your culture before being enriched. You can always add more enrichment if the water clears in less than 12 hours.
New water and new enrichment for the second 12 hours is again protection against a wipe out, and lessens the chance of adding nasty bacteria cultures to the dwarf tank.