Refug?

[Reason]

Can someone explain what exactly this concept is. Obviously new to this hobby and want all the info to make smart choices.

[davejnz]

A refug is a broad term but generally it is a place in the sump thats used to grow macroalgae and/or have a DSB(deep sand bed).DSB's are great for nitrate reduction.If you plan on haveing a DSB in your display tank,then its not necessary to have one in your refuge IMO.The refuge is kept free of fish,corals,crabs,predators.This gives copepods and amphipods a place to populate and reproduce at.Pods(slang term)are great in a reef tank,they graze algae as well as provide a food source for fish/corals.

[davejnz]

Here's a link for you on building one.
http://www.captivereefing.com/showthread.php?t=2741

[lReef lKeeper]

nice defining there david, i could not have said it better myself. BTW check out my new mugshot i think you'll get a kick out of it.