I'm getting the "renamed or deleted by owner" message, too. Check your access permissions to make sure it is viewable by the public.
Your mandarin lives almost exclusively on pods so if he is fat and happy I would say they are getting into your display tank just fine.
I don't understand why you would think you need to control the pod population. The more the merrier. They are cleaning up your tank/sump/refugium for you. There is no need to control them, as the more there are the more natural fish food your system is generating automatically.
That's a good thing.
Dave.M