Nitrate sponge/remover?

[afilter]

Thanks, I am also hoping the rubble which is in at same compartment as the bioballs will start to pick up some of the load as well.

 

[Brenden]

Aaron I also had bioballs in my wet/dry and over time removed them and put in rubble instead. I also use the pura filters you described in my drip tray. Here is a link to the cheapest place I have found the polyfilters.
http://store.fishsupply.com/s1ppb-04080.html

 

[afilter]

I found the poly filters at an LFS over the weekend and did not but any. For the cost I can get the Pura filter for less and have been happy with them. I also noticed they said nothing about removing nitrates.