miracle mud in media bag?

[Coderad]

I have decided on the mirical mud with some Caulerpa. Mabey some live rock rubble. But looking at my sump I don't know if I can just have a mud bed it might have to be in a media bag, or it will get sucked into the tank
How will that work with the Caulerpa?
or will it be fine just leaving the mud bed?

This is they style of sump "Amiracle Slim-Line Wet-Dry"
sorry fixed link
http://www.southbroadwaytropicals.co...ges/WetDry.htm
What do you think?