refugium

[CKreef]

Do you have to have a sand bed in a refugium? Can you just use live rockand macros?

 

[gflat65]

You can set it up however you like. I prefer adding a sand bed because it adds more sand to the system, but many are getting away from sandbeds altogether. Mine is a low flow area with sand and macros. The rock I emply in my fuge/sump arrangement is located in the sumop where the water falls from the tank (where the bioballs used to be/would be).

 

[KAiNE]

I do (4"), in both my fuges... also have LR ruble and a couple of larger LR pieces in one that wouldnt fit in my display.

 

[fishdoc11]

I just kept macro in mine when I ran one. If you do use sand(or even if you don't) push a bunch of flow through the fuge. If not lots of detritus will build up in there fairly quickly. I prefer no sand or rock so it can be cleaned out periodically. You will get plenty of critter growth in just chaeto. Here is a good fuge thread:
http://reefcentral.com/forums/showthread.php?s=&threadid=462212
JMO, Chris