what is a refugium?

[waterboy_007]

whats a refugium?

 

[mr . salty]

It's alot like a sump.But has dsb,rock,and lots of Macro algae in it.Water is pumped through it at a very slow rate to allow for nitrate removal...

 

[david s]

Salty thats one whopper of a bass in your pics lol
here is a pic of my small one and my sump beside it
http://members.bellatlantic.net/~vze...new_page_2.htm