Is This Possible? Obviously On A Bigger Scale?

[Sweeden]

 

[sawickib]

Yes its usually done with pothos to reduce nitrates in predator tanks. I have some pothos in all of my filters.
Heres my thread that i did with it. http/www.fishforums.net/index.php?/topic/430916-im-golden/?hl=%2Bim+%2Bgolden
 
 Some other tanks.
http/i582.photobucket.com/albums/ss270/CWO4GUNNER_G/DIY%20AND%20REVIEWS/60NitrateFilter002.jpg?t=1284845390
http/i1132.photobucket.com/albums/m569/spirofucci/20120827_171457.jpg