Haha, just to clarify, using nutrient absorbing media falls under chemical filtration, but since the topic has been brought up, I use pura complete, so far the results are satisfactory, I am able to keep po4 and no3 at a minimal I.e below 5 ppm.
I believe alot of the reefers use chemical filtration media as well, but in my case, chemical filtration is used as a back up, should there be a spike in nutrient level that the bacteria is not able to handle, the pura complete will. So far so good!
Is there actually a need for chemical filtration is a debatable question.