Well... How much you need is dependent on how much overall phos you have and how quickly you want to reduce it. The media will only absorb a certain amount, then it is "full".
It becomes a question of how fast you want the phos pulled out, and how long you want the media to last before you have to change it.
__________________
400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
|