What forms do carbon filters come in and which is generally better?

What forms do carbon filters come in and which is generally better? Video Clips. Duration : 0.68 Mins.

What forms do carbon filters come in and which is generally better? ------------------------------------------------ Activated carbon filters used for home water treatment typically contain either granular activated carbon (GAC) or powdered block carbon (carbon block). Although both are effective, carbon block filters generally have a higher contaminant removal ratio and are more resistant to channelling. www.wannagetwater.com

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