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Discussion Starter · #1 ·
What exactly defines "bright yellow" and "green" according to their test method? I didn't really see a comparison in the box...and everyone has their own idea of the colors I'd think.
 

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API hardness tests give an unequivocal reading, in my opinion. There is no interpretation needed. But, the GH test may not work at all if the kit is a little old, in my experience, and that can include not working the first time you open the box.
 

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Discussion Starter · #3 ·
Well I know that it's accurate, I was just wondering at what point I need to stop adding drops to know what my parameters are and was hoping that someone could provide a comparison color to use, because they don't ship one with the box.
 

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Well I know that it's accurate, I was just wondering at what point I need to stop adding drops to know what my parameters are and was hoping that someone could provide a comparison color to use, because they don't ship one with the box.

basically if the water turns green 1st drop... it has < 17.9ppm GH
If the water turns green say 7th drop... it has 125.3ppm GH

same goes for KH. 1st drop water turns yellow means <17.9ppm KH
If the water turns yellow at 7th drop... it has 125.3ppm KH

*You will see the transformation from orange to green after the whatever drops (GH), and blue to yellow (KH)
*Again If you see no transition in color, 1st drop water turns green(GH) / 1st drop water turns yellow (KH). Means you have <1 degree gh/kh or 17.9ppm
 

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I was confused by that too. It also doesn't help that I have color blindness which involves shades of green. I have to ask my wife to be sure each time.
 
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