Thats pretty cool that you were able to buy captive bred ones. I read an article about how quickly the poplulation of sea horses are declining due to their use in chinese medicine and people using dried out sea horses as "decorations" how could anybody do that? Might as well, go shoot a deer, dessicate it and put it in your living room too while you are at it.
Are you going to try to breed those sea horses? That would be really awesome to see pics of the babies. You could even sell offspring to fellow fish keepers so as to not touch the wild poplulation of sea horses. ^_^
Plenums and ultra deep sand beds > all other setups!