First off, IMO, a ten gallon tank is much too large unless you plan to REALLY populate the tank, like over 50 dwarfs.
(you can fit about 3 or 4 adult dwarfs on a silver dollar as their average adult length is aroun 1 1/4")
Reason for this is, food density has to be VERY high for proper feeding.
Most dwarfs won't hunt down the food, but rather, sit on their hitches and wait for food to come by close enough to snick it up.
Now, for the feeding part, they need live foods, and, because it is nearly impossible for the average hobbyist to provide live copepods or other live foods naturally, or to culture enough to add, it is normally done by enrichment of day old brine shrimp with products like Dans Food from seahorsesource.com.
This means decapping or sterilizing the cysts before hatching, and after hatching, grow them out for a day and then enrich them in two 12 hour stages with new water and enrichment for each stage.
Any food not eaten before next feeding should be removed so that the dwarfs will only be eating the newly enriched brine nauplii, not the depleted ones from last feeding.
This feeding regimen alone causes a lot to quickly loose interest in the dwarf hobby.
Someone else will have to recommend any corals as I choose not to put corals in my seahorse tanks, dwarfs or standards, as recommended operational temperatures of 68° to 74° rather limit what would survive.
