Lost Tetra KH and GH directions - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 03-08-2005, 04:24 PM Thread Starter
 
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Lost Tetra KH and GH directions

I looked at my test kit today and noticed that Iíve lost the directions for my KH and GH (Tetra/Laborett) test kits. I know that they are titration style kits but I canít remember if the drops stand for one degree of hardness each or what. (I used 5 ml of water for each test) Does anyone else use these kits?
Thanks
Heather
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post #2 of 7 (permalink) Old 03-08-2005, 04:34 PM
 
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I use the KH kit. One drop = 1 dKH. Count drops until the solution turns yellow.
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post #3 of 7 (permalink) Old 03-08-2005, 04:43 PM
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I use Nutrafin/Hagen kit not sure if it counts the same way.
KH:
Add and count drops to 5ml untill water turns from blue to yellow, multiply by 10 to get PPM.

GH:
Add and count drops to 5ml untill water turns from pink to purple, multiply drops by 20 to get PPM.

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post #4 of 7 (permalink) Old 03-08-2005, 04:43 PM
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On mine, you add 1 drop of KH until the solution turns yellow(1 drop = 1dkH) and for the GH its the same, except the solution will turn green.

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post #5 of 7 (permalink) Old 03-08-2005, 06:31 PM
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I have used the Tetra kits.

For KH;
You are looking for a colour change from Blue to Yellow
Using 5ml aquarium water (standard) sample... 1 drop of reagent = 1 degrees of German Harndess (dGH).
Using 10ml aquarium water sample... 1 drop of reagnet = 0.5 degrees of German Hardness (dGH)

For GH;
You are looking for a colour change from Red to Green
Using 5ml aquarium water (standard) sample... 1 drop of reagent = 1 degrees of German Harndess (dGH).
Using 10ml aquarium water sample... 1 drop of reagnet = 0.5 degrees of German Hardness (dGH)



(p.s. I now use the Hagen kit 75sausage. It measures the hardness as mg/l of CaCO3, which you must multiply by 0.056 to convert to dGH.)


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post #6 of 7 (permalink) Old 03-08-2005, 07:38 PM Thread Starter
 
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Thanks for the help, I now realize I have a serious problem with water quality.
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post #7 of 7 (permalink) Old 03-09-2005, 12:54 AM
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What have you discovered?
Things aren't always what they at first seem.


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