Kelly,
Welcome to The Reef Tank!
JennM is our resident Sea Horse expert, Bill-e, Brooke and a few others have also kept
sea horses in the past.
Sea Horse tanks need to be set up a little differently than a regular fish only tank or reef tank. Currents must be kept lower and especially with the larger "horses" they need a tank that is taller than it is long. Sea Horse keepers often use hex tanks.
Compatiblity with other fish is an issue as Sea Horses need calm tank mates and only a few or they will get out-competed for food. The tank raised horses are easier to sustain as they are trained to accept non-live foods; wild caught horses often die of starvation. They need to be fed small meals several times a day as they really have no "stomach."
Sea Horses are also prone to diseases unique to them so reading up on symptoms and treatments would be a good idea. I'm hoping that Jenn and the others can provide you with some reading material and the links to the horse boards that are out there.
I find Sea Horses fascinating creatures but they represent a commitment of time I just don't have. Good reading and good luck; glad to have you here!
Alice