What brand of Activated carbon do you suggest?

[143gadgets]

I hae a 40 gal tank with an emperor 400 HOB filter. I am looking into using AC or Filter floss in the two media containers. Which one should I use? If you suggest to use AC, what is the best brand? And is it Phosphate free?

 

[captivereefs]

ESV makes a nice phosphate free carbon. So does seachem

 

[SoylentGrundy]

I like Fritz carbon and Seachem