While they are tenatious in their pursuit of food, Seahorses are not aggressive feeders, doing best in a tank with slower moving fish such as the Mandarin Dragonet. Slow swimming Seahorses also do not fare well in aquariums with more than a very light current. The DIY Seahorse Tank which is taller, rather than wider, was specifically designed to house a Seahorse or two and a Mandarin Dragonet.
Thinking about adding a Seahorse to your tank? See the Saltwater Aquarium Fish Compatibility Chart first.