nutrafin kh and GH test kit. how to use properly?!?!! - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 04-04-2014, 02:35 PM Thread Starter
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nutrafin kh and GH test kit. how to use properly?!?!!

I never used this before. I want to test for kh. I am supposed to add one drop at a time and watch for the color to go from blue to yellow.

Where I fail to understand is, do they mean the slightest sign of yellow tint? Or do I need to match the yellow on the back as close at possible??

If you know please help.me test so I can have an accurate measurement. Thanks
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post #2 of 5 (permalink) Old 04-04-2014, 04:44 PM
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Once the liquid turns completely yellow, the titration is complete. In general, the number of drops required to turn the liquid completely yellow is your hardness in German degrees.

Anthony


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post #3 of 5 (permalink) Old 04-04-2014, 05:58 PM Thread Starter
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Still leaving guessing as to what degree of yellow.

I can get a color change in about 3 drops. But its not a bright yellow like the card.
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post #4 of 5 (permalink) Old 04-04-2014, 11:16 PM
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Quote:
Originally Posted by philipraposo1982 View Post
Still leaving guessing as to what degree of yellow.

I can get a color change in about 3 drops. But its not a bright yellow like the card.
I also have this too! What shade of yellow do you use?
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post #5 of 5 (permalink) Old 04-05-2014, 04:27 AM
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Quote:
Originally Posted by philipraposo1982 View Post
Still leaving guessing as to what degree of yellow.

I can get a color change in about 3 drops. But its not a bright yellow like the card.
Quote:
Originally Posted by Dirtybird29 View Post
I also have this too! What shade of yellow do you use?
Once it turns yellow. The shade does not matter.

If it is green, then the titration is not complete, and adding an additional drop (or two) will make it yellow, signaling the titration is complete.

Anthony


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