API KH test kit - The Planted Tank Forum
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post #1 of 5 (permalink) Old 06-03-2017, 01:24 AM Thread Starter
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API KH test kit

After 3 drops, there's a sudden color change from blue to green (with maybe a yellow tinge). After 4 drops it's very clearly yellow. Is my dKH somewhere in between 3 and 4, or is it just 4?

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post #2 of 5 (permalink) Old 06-03-2017, 01:38 AM
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Originally Posted by Axelrodi202 View Post
After 3 drops, there's a sudden color change from blue to green (with maybe a yellow tinge). After 4 drops it's very clearly yellow. Is my dKH somewhere in between 3 and 4, or is it just 4?
Yes. You can do it more accurately if you like by testing double the volume specified and counting each drop as 0.5

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post #3 of 5 (permalink) Old 06-03-2017, 01:41 AM
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I think many would consider that to be 4, although you could try to be more technical and say it's 3.5 or something like that.
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post #4 of 5 (permalink) Old 06-03-2017, 05:00 AM
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Lol I was having this just today as well, but with 2-3. I was calling it 2.5.
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post #5 of 5 (permalink) Old 06-03-2017, 11:01 AM Thread Starter
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Thanks guys. I guess it's time to cut back on the potassium bicarbonate...

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