Hi Jerry,
Here are some tips I picked up along the way. SEAHORSE.COM is a good resource.
1. Seahorses need a species specific tank of their own. They are slow eaters. Need very selective tank mates.
2. Need excellent filtration system and good clean up crew. Consider an algae turf scrubber. They are messy eaters.
3. Cooler temps, ie. 70 deg. Helps them resist diseases/infections.
4. Taller tanks better
5. Avoid stinging corals.
6. Best place To buy seahorses is SEAHORSE.COM, from hawaii.
7. Needs lots of hitching posts. Tonga branch rocks works well.
8. Low to moderate flow. They are not strong swimmers.
9. Bright colorful tank decorations help them keep their colors.
10. They don’t eat pellets. Prefer frozen mysis.
Wish you luck.