Calcium and pool heater

[waterbear]

What test kit are you using? if it is the aquachem test kit from places like walmart there seems to be some problems with the Calcium hardness test. See this thread
http://www.poolforum.com/pf2/showthread.php?t=1112

If you are using Ben's kit or a Taylor kit and the water turned bue when you added the indicator it means you have 0 ppm calcium hardness.

[seminolewind]

Thanks waterbear for getting back to me. I'm using a drop kit from Leslie's and when I initially added the indicator, there was absolutely no change in the water color. What does that mean if anything?

[waterbear]

If I am not mistaken the Leslie's kit is a rebranded Taylor kit. If this is true you first add 20 drops of calcium buffer, then 5 drops of indicator (which is blue in color but turns pink if hardness is present) then titrate drop by drop until the color changes to blue. If the Indicator stays blue when you add it then there is not CH present. If this is not the kit you have I am really not sure.