The hardest part is getting them established in a tank disease free. I treat my seahorse tank no differently than my other tank except that i feed the seahorse tank twice a day. The tanks are set up differently though, hex is tall since the seahorses like height and it has less flow and less light.
I have pics on my profile in my albums, and in the gallery as well. None of the new seahorse yet but ill get them posted soon i hope.
kelsey's 40 gallon seahorse tank