Has anyone else found that their tap water has nitrates? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 11-30-2009, 08:40 PM Thread Starter
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Has anyone else found that their tap water has nitrates?

So I tested my aquarium's nitrate levels and found that they seemed to be on the high side.. around 40ppm, so I decided to test my tap water assuming it would be at zero. The test came out to 20ppm for the tap water so I assumed that I could subtract that from my tank's results and get a decent number.

I got a bug though and decided to test against some bottled water and the test came up zero.. telling me that my tank really does have about 40ppm and my tap water has 20ppm!

Anyone else have this problem?

Jarod
I'm in the Saint Louis, MO area and always looking to connect with other planted tank enthusiasts.

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post #2 of 5 (permalink) Old 11-30-2009, 10:34 PM
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I wouldn't really call it a problem. As long as you know it and want to keep planted tanks, 20 ppm seems like a nice number. The MCL for NO3 is 45 ppm (NO3-N 10 ppm).

My tapwater usually has between 5 and 9 ppm, according to the water report. Test kits are sometimes hard to read.


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post #3 of 5 (permalink) Old 12-01-2009, 02:34 AM Thread Starter
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20 ppm isn't bad for my tank at all; and I guess its one less thing I will have to dose much of. But now I'm thinking of health concerns.. I'll have to take this to another forum..

Jarod
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post #4 of 5 (permalink) Old 12-01-2009, 03:48 AM
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post #5 of 5 (permalink) Old 12-01-2009, 04:51 AM
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I'm pretty sure that my water in St. Paul, MN has about 20 ppm of Nitrates. Its been a while since I checked.


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