what grade carbon should i use?

I have been using BRS rox .8. But they also sell way cheaper stuff.

I read someone saying, i use carbon, but dont need the rox 0.8. Like it was more then he needed?

How do i determine what grade carbon i should use?

75gal dt, 25gal sump

 

Higher quality carbon lasts longer, works better, tends to not fall apart/has less dust, and also tends to not release anything once it becomes exhausted.

Which one should you use? That's up to you, your wallet, and the shape you need (if any). That being said, you'll replace quality carbon less, so in a way, that helps mitigate some of the cost.

 

Oh i was told to replace it every week. How do you know when to replace? And how do i know what shape i need?