What to put in my refugium?

[bigmick88]

I have a 75 gallon setup with a 30 gallon sump/refugium. The display has a 1"-1 and 1/2" sand bed. I'm going to be running a bermuda 5c skimmer (rated up to a 400 gallon). I'm curious as to what you guys think I should put in the refugium? I was think miracle mud but don't know if its worth the $. what about just rubble and chaeto? Any suggestions?

 

[volks]

I've never used Miracle Mud, but I have heard exactly what the name insinuates... works like a "Miracle". But other than that, if it were me, I'd do live rock in rubble form and larger pieces as well as caulerpa or macro-algae of some sort because even though the stuff grows like a weed and usually requires some pruning, it removes dissolved nutrients very very well in my experience.

 

[asharp13]

is chaeto macro algae? if not, what do you mean by this?
i have seen very cool refugiums that look almost like DT's. they have a thick sand bed, LRR, and chaeto. some have eggcrate racks that hold coral frags, inverts, and fish...very cool IMO.