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Old 03-20-2014, 03:31 PM   #1
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GH Test

Do these tests go bad? API drop tests.
I have an old test (maybe 6years old) and when i try to test my water it wont change color. Do i have super hard water or bad test drops?
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Old 03-20-2014, 04:25 PM   #2
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test them with some bottled water
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Old 03-20-2014, 05:09 PM   #3
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The ones I use have expiration dates on them.
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Old 03-20-2014, 05:50 PM   #4
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How many drops have you used without the color change? An API GH/KH kit costs about $6 online, so buying a new one is pretty cost effective. My kit has expiration dates, too.
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Old 03-20-2014, 08:06 PM   #5
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i put 50 drops in it before stopping. Just kept getting more and more orange. The KH test took 4 drops and changed color. I just see lot numbers on my test bottle.
The cost isn't an issue on a new one. i figured on buying a new one. i just wanted to make sure i have to, otherwise the money could buy fish or plants.
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Old 03-20-2014, 08:19 PM   #6
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LOL. From day one the GH test kit I bought never would change also. The KH bottle tested just fine. Since I got the GH from our city water quality report I never messed with it again. I figure it's a bad bottle. I'll buy another when the KH runs out. I'm beginning to believe that dud test bottles of the API stuff is not that uncommon. OS.
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Old 03-20-2014, 08:25 PM   #7
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as far as i recall it used to work.. . . . . i think. . . . . . .. . it was a long time ago.
i havent tried to change the hardness but i am wanting to do a amazon biotope with dwarf cichlids so i wanted to check where i'm starting from and if it will be an issue.
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Old 03-20-2014, 08:36 PM   #8
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That's what I have in my 29g, all soft water tetras. I've always worried more about the KH than the GH because of needed pH buffering with CO2. My water is 2 dKH in winter and 4dKH in summer. For GH look online for your water report if you have one. OS.
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