API GH/KH test question. - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 10-17-2011, 04:11 PM Thread Starter
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API GH/KH test question.

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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post #2 of 8 (permalink) Old 10-17-2011, 06:53 PM
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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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post #3 of 8 (permalink) Old 10-18-2011, 01:19 AM Thread Starter
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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.


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post #4 of 8 (permalink) Old 10-18-2011, 02:30 AM
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Quote:
Originally Posted by freph View Post
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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post #5 of 8 (permalink) Old 10-18-2011, 02:55 AM Thread Starter
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So basically a soon as it gets a tinge of green or yellow it's good to go?


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post #6 of 8 (permalink) Old 10-18-2011, 03:03 AM
These pants? are fancy.
 
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Yessir!
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post #7 of 8 (permalink) Old 10-18-2011, 04:24 AM Thread Starter
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Alrighty, thanks folks.


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post #8 of 8 (permalink) Old 10-19-2011, 05:36 PM
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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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