From my perspective, set up your tank so the lighting schedule follows your wake/sleep schedule, that way the seahorses will acclimate to your wake/sleep schedule. It'll take a few day or a week, but, they will learn to sleep when it's lights out for the tank, then feed in the morning before you leave, then feed as soon as you get home, and once more before lights out.
What you can also do is start an amphipod culture, and after you feed frozen in the morning, you can then feed some amphipods to the tank into a spot where the seahorses can't easily get into, then, as the amphipods scatter and hide, the seahorses can hunt them through the day.
Also, depending on how tech savy you are, you can also set up an auto live brine feeder (deli cup over the tank with a 1/4 drain line coming out of the bottom. drain line connected to a solenoid valve, and then set the solenoid valve on a timer to feed the tank about half way through the day). Doing something like this will take quite a bit of vigilance on your part though to keep bad bacteria levels low (i.e. get a live brine culture going in a container, formalin treat the live brine culture to kill bacteria in the water over 48-72 hours, then rinse well in rodi water, then put into fresh saltwater for 24 hours and gut load with whatever enrichment you choose, then rinse again in rodi water, then put the live brine into the deli container with new saltwater for feeding that day).
If you don't have the time to build a system to feed for you, I'd say adjust your lighting schedule so the seahorses follow your waking schedule.
Just my 2 cents.