What is GFO

[Harpo]

Hi Everyone,

Just wondering what GFO as I kinda know what it is and wondering what you would use it in? And how would you use it?

Thanks for any info or links so I can learn about it.

[eli@fijireefrock.com]

Granulated Ferric Oxide
here is some reading.Quite informative.Most people use it in a reactor with tank water penetrates one end tumble the GFO at a slow rate and returns to your tank.
GFO (http://reefkeeping.com/issues/2004-11/rhf/index.php)