[rayjay]

Well, there are no guarantees with salt water fish, and especially seahorses, but if you do everything right, and buy the right seahorses, then you have a good chance.
Once you get over the hump of the first few months, then the next thing to watch for is complacency that sets in.
When nothing goes wrong, I see time and time a gain where people (including me years ago) feel that every thing is going just fine, and husbandry gets a little more time between things. Then, bacteria starts to build up and all of a sudden, the seahorses you've have for a year or so, suddenly get tail or snout rot or something else, and die.
It didn't really just happen, it had been building up since back when we/I started to slacken off with keeping everything as pristine as it used to be kept.
Keeping seahorses LONGTERM is an investment that never ends when you are talking about the time put into their success.
IMO, if one isn't prepared to do the work now AND down the road, then one shouldn't get into keeping seahorses.

p.s. Thanks for taking the time to check out seahorse needs BEFORE you get right into it!