Seahorse keeping should not be tackled by the casual aquarist, because seahorses usually die quickly in captivity. Seahorses are already at risk around the world, partly because they are exploited for aquarium fishes. The following notes are intended only for very experienced marine aquarists. Think about whether you can realistically hope to care for these fishes, before you buy them, and if you have any doubts, choose something easier. Seahorses eat a great deal but are rather particular so feeding them is one of the most difficult aspects of keeping them.
Seahorses eat live fresh food.
They need a variety of foods and cannot be fed solely on an unbalanced diet of Artemia. However, frozen foods alone are not a balanced diet and will eventually result in malnutrition and illness. Feed small amounts frequently rather than a lot at any one feeding. Twice a day feedings are probably adequate but three times a day is much better. Best feeding times seem to be as the full lights go on, and at mid-day, and again one to two hours before the main lights go off.