What substrate for refugium

[MDG3]

Hi
I have a 90 gal Fowlr/inverts and a 25 gal sump/refuge.

What substrate is good for a reugium? I have oolith(sp) in there now and some razor caulerpa and some small(broken) pieces of live rock. Is that OK?

Thanks in advance.

[Reefhawk1]

I have sugar Aragonite in my refugium. Its really your preferance on what you want to use.

[Willow]

i run mud in mine.

[MDG3]

Thanks for the quick reply, Reefhawk1. Some people are using something else and I didn't check with the forum before I started to set it up.

I also had some tiny hermit crabs in the fuge til I noticed they were eating the caulerpa.

They're in the display tank now.

Thanks.

[rayyue]

sugar size i am using and 6" deep

[muck]

Barebottom with loads of rubble in my Fuge..