If you want to keep seahorses, my best advice to you would be to set up the tank & let it run for a couple of months with some pods & live mysis. When they breed enough to overrun the tank then you will have some added insurance in case your new captive breds decide not to eat frzn foods (which they often do). Will you have the time to target feed them small amounts of mysis several times a day? These are high maintenance fish & being prepared tank-wise & being willing to give them the care they need will give you the best chance of having success.
BTW, the Coral Magazine James recommends is an awesome resource.
Good luck & here's a pic of mine,
Anthony