FAQ: I see that Seachem MatrixCarbon™ is more aggressive at filtration and has a higher capacity than Renew™. In what situations would I want to use Renew™?

In planted or reef tanks, it can be advantageous to leave some of the organics in the tank so they are available to fish, plants, or corals. In these situations, a media like Renew™ allows for control of organics without total depletion as with more aggressive medias. Additionally, Renew™ will leach no phosphate into the tank at all, which makes it excellent for use in situations where phosphates are being tightly controlled.