dissapointed in the inconsistent of my API/JBL KH test kits, help - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 08-16-2020, 07:09 AM Thread Starter
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dissapointed in the inconsistent of my API/JBL KH test kits, help

i bought a new API KH test kit, results show 8 KH.
my other one is JBL's, show 5 KH.

I tested several times with both, same results... they both drop solutions where you drop until color change...

API expiry 2024,

JBL i don't really know, the only number on the bottle that looks like some sort of date saying 1016 and i don't know what to make of it, i have another JBL test bottle (not KH), i got a week ago from a store saying 1011...

and now i don't know what to do, i added co2 system to my tank and i need to know the exact KH level 😕
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post #2 of 3 (permalink) Old 08-16-2020, 08:26 AM
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You have a LFS who will do a 3rd test for you as to sanity check?

Or maybe make up a calibration standard solution to test your tests?

For example see here:
https://www.plantedtank.net/forums/2...ndard-how.html


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post #3 of 3 (permalink) Old 08-16-2020, 10:53 AM
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Just a tip don't know if it will help you now but it will later, no doubt. Those test vials need to be thoroughly cleaned out after each use to ensure accurate readings a second (third, fourth, etc) time.



I use my plant tweezers and a torn piece of paper towel.

Mike

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