Red Sea Nitrate versus time - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 01-14-2004, 05:22 AM Thread Starter
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So after 5 minutes, my Nitrate test says TRACE ppm.

After 30 mins, 1.0 ppm.
After 1 hour, 2.5 ppm.
After 2 hours 5.0 ppm.

Then it stops changing colors.

The test says look at 5 mins.

Anyone else see this and know which reading is the official one ??

I'm glad I didnt empty the tube out one day. I've been thinking it was under 1.0 this whole time and putting more and more Flourish Nitrogen in.
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post #2 of 12 (permalink) Old 01-14-2004, 01:10 PM
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Sheesh, that's ridiculous. As hard as test kits are to read, now we need to take out a stopwatch to make sure the reading is accurate? I'd email Red Sea and see what their official standpoint is.

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post #3 of 12 (permalink) Old 01-14-2004, 01:55 PM
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In the instructions they tell you to read it at a specific time point, most kits do. I would go by the 5 minute reading, not the 2 hour one.

George


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post #4 of 12 (permalink) Old 01-14-2004, 04:35 PM
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I'd still like to hear their explanation, even though it's probably going to be consistent with George's statement.

James
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post #5 of 12 (permalink) Old 01-14-2004, 06:40 PM
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My guess is just that it takes a certain amount of time for the color-changing reaction to occur and at a certain time a certain color will tell you the PPM, so they figured out the concentrations and the colors and the best time to use.

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post #6 of 12 (permalink) Old 01-14-2004, 07:47 PM Thread Starter
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Red Sea is supposed to be calling me back.

I've been dosing Flourish Nitrogen enough that I am thinking the 2 hour value is correct.

I've added 1 ml to my 37 gallon about 5 times since last week, and the instructions says 1ml is for 20Gallons (not sure the PPM).
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post #7 of 12 (permalink) Old 01-14-2004, 08:30 PM Thread Starter
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Red Sea called.

They said the color change is coming from the Nitrogen in the air.
8 mins is the most time needed to wait.

Time for a bucket test.
Sigh.
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post #8 of 12 (permalink) Old 01-14-2004, 09:11 PM
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Fascinating. So even at 8 minutes, the reading has been skewed from nitrogen absorption from the atmosphere. How is one to know what part of the tested level is contibuted from Nitrate in the water and how much is contributed from the air?
How about letting it sit with the cap on? That should keep nitrogen absorption to a minimum.

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post #9 of 12 (permalink) Old 01-15-2004, 12:44 AM Thread Starter
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After 8 mins the Nitrogen in the air supposedly starts mixing...

Seachem is coming out with a Total Nitrate test....
that should spell the end of all other tests (unless Seachem continues the 10 colors of light blue problem)....

See the bottom blurb at:
http://seachem.com/en_products/produ...2_Flrsh_N.html
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post #10 of 12 (permalink) Old 01-15-2004, 03:04 PM Thread Starter
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So then I asked Seachem....

They said there's no test kit available to read elemental Nitrogen, nor is there Nitrate in the air...

They think the Red Sea kit is functional...just slow.

>The kit is likely just fine.
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post #11 of 12 (permalink) Old 01-16-2004, 02:37 AM Thread Starter
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I solved my Red Sea problem....

I bought a new Aquarm.Pharm Nitrate test.

Right out of the box its reading 10 PPM from my tank.

Red Sea 0ppm after 8 mins...


What a bunch of garbage Red Sea is....
I've purchased the "Plant Kit" and "O2" kits from Red Sea in the past, and have never gotten a good reading out of those either.

And then hearing a Red Sea tech explain the false reading...funny.
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post #12 of 12 (permalink) Old 01-16-2004, 04:47 AM
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Interesting. My experience has been quite different. Diversity is good :mrgreen:


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