A birds nest should do fine under a 175 mh. I kept a large colony for years in a 46 bow with just 2 96 watt pc's and it did great, even with these low light conditions.
If you can find a large scooter you can feed him live tubefex worms and live brine shrimp, but these can fowl the tank and the frequent feedings required by a fish that feeds throught the day on copepods lend it best to a large reef setup.
I am considering purchusing a small mangrove for one of my refugiums. I have never kept one before and I hope somebody can help with a little information such as growth rates,and lighting.
I have limited experience with these shrimp. They ate chocolate chip stars for me. You can ask your lfs to order you "defective" starfish (missing appendage), which are some times available. In terms of a feeding regimen, these shrimp are very small and should have a constant food source- ie...