Testing Kh problem - The Planted Tank Forum
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post #1 of 10 (permalink) Old 09-02-2019, 10:21 PM Thread Starter
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Testing Kh problem

Put up to 25 drops. Kept getting dark blue. What to do?
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post #2 of 10 (permalink) Old 09-02-2019, 10:40 PM
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Try 26 drops ...

Which test kit is it and has it expired? Have you tried it on your tap water?
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post #3 of 10 (permalink) Old 09-02-2019, 10:57 PM
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Try a bottled water derived from an R/O source it will most likely not turn blue.


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post #4 of 10 (permalink) Old 09-02-2019, 11:41 PM Thread Starter
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Using API liquid. Is not out dated
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post #5 of 10 (permalink) Old 09-03-2019, 12:02 AM
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Using API liquid. Is not out dated
Did you try it on other water sources?
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post #6 of 10 (permalink) Old 09-03-2019, 12:34 AM Thread Starter
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Did you try it on other water sources?
Well tested it with distilled water and right away was yellow. So retested tank water. Went up to 32 drops to get yellow. Gh was only 4 drops. So according to conversion chart have

GH 71.6 ppm and KH 572.8 ppm. PH is 7.8. Don't usually test but experimenting with L-Arginine in filter. It increases Co2 in land plants so wanted to see what it would do for aquatic plants. According to PH KH chart I probably have no Co2.
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post #7 of 10 (permalink) Old 09-03-2019, 12:48 AM
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Well, I guess you have your answer; dKH is 32. I'm not familiar with L-Arginine, but thought it had to do more with nitrogen than carbon. Is it supposed to raise KH as well? How about the substrate or other carbonate sources in your tank?

...or are you ok with the high KH and just wanted to check the test kit?
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post #8 of 10 (permalink) Old 09-03-2019, 12:48 AM
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Quote:
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GH 71.6 ppm and KH 572.8 ppm. PH is 7.8. Don't usually test but experimenting with L-Arginine in filter. It increases Co2 in land plants so wanted to see what it would do for aquatic plants. According to PH KH chart I probably have no Co2.
Terrestrial plants have access to all the CO2 they need!

I would ditch the experiment and start changing lots of water.


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post #9 of 10 (permalink) Old 09-03-2019, 05:08 PM Thread Starter
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I have been ill and forgot l arginine is for nitrogen. High isn't hurting anything so go to just decrease the l arginine
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post #10 of 10 (permalink) Old 09-03-2019, 05:16 PM
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According to PH KH chart I probably have no Co2.
Then that CO2 chart is just about useless for measuring CO2 in your tank.


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