I'm not sure I see much point in staying up all night counting bugs on the glass but that's just me. I've always found mandarins very easy to care for and provided you've got enough established rock you should be fine, the problem is there survival rate isn't that good but it's related to reasons other than starvation. If you really want to look into it then you can check out this thread on another site:
http://reefcentral.com/forums/showthread.php?t=1492650