My tank recently cycled, and I added two small hermits and two small astrea snails a few days ago. Today I purchased a skunk cleaner shrimp and was told I didn't need to feed it. However, since there are no fish in there I haven't been putting food in there- but I don't want the little guys to starve. There's not any algae either- but there is live sand and a piece of artificial live rock that was "seeded" in another tank. Any ideas on what I should be feeding them?