Nhunt - Yeah, he was the bravest one and first to venture inside the feeding bowl. But actually, he had a little difficulty getting out since he's smaller. After that pic I put those green weighted squares inside the bowl to help him out until he figures out how to swim straight up or gets big enough to get out on his own. A female hybrid when inside the bowl shortly after and she ate a lot! She's twice his size, so she swam out easily, sorry no pics of that.
As for aquascaping/decoration, I kept it pretty simple and open, gave them room to swim and occasionally see them resting on the sand and checking corners for pods. They're almost entirely gone, at least the amphipods I seeded the tank with. If I had the patience and better lighting, I'd go with real macro algae/plants. I've seen some really nice ones here on RC (like in this thread) and on YouTube.
kudagirl - No, I don't rinse the food, instead I soak it in Selcon and Garlic Extract and let the frozen cube defrost in the refrigerator the night before. Then, in the morning, I place about 75% of the food inside the feeding bowl and the rest, I spread out in popular places of the tank where they hang out and go "hunting". My goal is to have them feeding exclusively from the feeding bowl in a week or two, less messy that way.
I probably should rinse the food, but would fear the Selcon and Garlic Extract might get rinsed off as well. Plus, I've gotten too comfortable feeding frozen cubes directly to my other tank (FOWLR) for years and relied on my skimmer (and monthly sw changes) to do the clean up work. I plan on letting my skimmer and filter do the same thing for the seahorse tank.
EDIT: Almost forgot, quick specs...36G Bow-Front, Aquamaxx HOB Skimmer, Aqueon Filter (starter package with tank/stand), 20 lbs. live sand, Hydor Koralia Nano 240GPH.