J jsteel Experienced Reefer Rating - 0% 0 0 0 Mar 13, 2006 #1 does anyone have one of these and know what color it is supposed to turn when exhausted? is it obvious or more subtle?
does anyone have one of these and know what color it is supposed to turn when exhausted? is it obvious or more subtle?
C comatose Experienced Reefer Rating - 0% 0 0 0 Mar 16, 2006 #2 i have one, But i dont worry about color, although i do see it changing. I just test my water and when my TDS's start to rise i change all three, usually thats about twice a year for me Spring & Fall.
i have one, But i dont worry about color, although i do see it changing. I just test my water and when my TDS's start to rise i change all three, usually thats about twice a year for me Spring & Fall.
