Nov 7, 2003 #1 F fnscasey Aquarium Advice Regular Joined Sep 9, 2003 Messages 56 Location singapore For dosing kalkwasser or other additives, do we need to remove the activate carbon in the filter ?
Nov 7, 2003 #2 B Bang Guy Aquarium Advice FINatic Joined May 22, 2002 Messages 610 Location Western NY No.