No, its pretty pointless if you dont have anything 2 clean up.. wait till you get fish and everything and then get the clean up crew
They will die if there is nothing 2 eat
Is there live rock in the tank? I cycled mine and thought the same thing but as soon as I put the clean up crew in they swarmed all over the live rock.
A clean up crew should be OK. Mine fed off of the die off from the live rock. About a week later I added a fish and everything is still going great. I've only had 2 hermits die over the last 6 months.