Somewhat confused

Can someone explain the refugium process to me. I've been to numerous websites and perused a few books, but can't find an answer that I can fully grasp. ie - How does it function as a filter? & How is a refugium constructed?
Is anything besides the fuge needed filtration wise? I've always used hang-on or canisters, so refugiums are completely new to me.

 

Fuge's are a good place to have Live Rock, Deep Sand Beds or Macro Algae. Or a combination of the above.
LR = basic biologic filtration
DSB = denitrification and aerobic biologic
Macro = reduction of nutrients, especially phosphates.

You can also grow pods, use it to isolate corals, inverts or other fish.

There is more, but that is a good start.

 

Here are some ideas for ya that I collected from around this site. Hope these help. This is Coveys overflow pic.. but if you read the thread (Nice cheap overflow) it will explain how it works. Good luck.
TIA

 

Tanks a lot

Thanks for the ideas guys. I think I'm getting it. A trip to a few shops might help as well.

 

I noticed you are in NJ as well! What shops have you seen around?

 

Will research

I only know of 2 right now: Aqua Oceans on Rt 9, Lakewood and Tropiquarium on Hwy 35 in Ocean twp. I haven't been to either lately. Since it's been years since I've had a marine aquarium, I'll be checking phone books and the net for retailers. Once I have a list I'll take a couple of daytrips. I will post the list of stores that sell reef equip, etc. as soon as I compile one. I'm hoping to get out the first weekend in March. Could someone from Jersey lend a hand?