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Old 06/21/2017, 10:02 PM   #1
Darth_Tater
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How Common is False Positive Ammonia Test?

I've had some strange readings that make me think I might be getting false positive ammonia tests. How common is this?


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Old 06/22/2017, 05:33 AM   #2
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Seems to be pretty common.. Lots report showing .25 or .5 with API test kits..


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Old 06/22/2017, 10:24 AM   #3
Deezill
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Yeah I have been checking my ammonia and I have been getting 0.25 too. My tank is 16 months old I have plenty bio media not to mention I have used Dr. Tim's one and only 6 month after I started the tank because i performed water changes and I thought it would be good to replenish any lost bacteria. I was thinking of ordering more Dr. Tim's once I saw the readings.


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Old 06/22/2017, 11:54 AM   #4
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I can't decide whether that's good or bad! So... any more reliable ways to test Ammonia? I couldn't find another brand test kit when I looked.


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Old 06/22/2017, 07:18 PM   #5
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If you add a neutralizer like ClorAm-X, and test again, do you still get the same results?


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Old 06/23/2017, 10:34 AM   #6
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I was using Seachem Prime and getting positives, about .25 PPM. I was also got a positive in my 2 year old tank and then a negative the next day. I was confused until I read something about false positives and just wondered how common it is. It's hard to read the API test with saltwater anyway since it turns all milky.


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Old 06/23/2017, 02:17 PM   #7
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I've been using the API ammonia test kit for very many years now and haven't had any problems using it. To the best of my knowledge, no false positive.


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Old 06/23/2017, 05:45 PM   #8
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Maybe I'll have to do some more experimentation.


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Old 06/26/2017, 10:38 AM   #9
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I've been periodically getting false positives since Salifert changed their tests. We have beige/brown walls and between that and the yellow incandescent lights the water in the test vial almost always seems to have a hint of yellow in it but it seems to be worse since they changed the test kit, and I've had a couple times where I've tested the water and gotten something >0, then re tested and gotten 0


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Old 06/26/2017, 10:41 AM   #10
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Prime + API is almost a guaranteed false positive. If you want to know for sure just test some bottled water and see if that reads zero or not.


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