Hanna nitrate LR test

[Kaiser]

Need help

Hanna nitrate LR test

Before dilution > 1.40 ppm

After dilution > 0.37 ppm (multiple by 10 = 3.7 ppm)

 

What is right ppm nitrate on my tank ?

 

 

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[Origami]

Assuming that you followed the dilution instructions correctly, your "before dilution" reading is more trustworthy. This is because of the specification for the Nitrate LR checker which Hanna specifies as follows:

 

+/- 0.25 ppm +/- 2% of reading at 25C (undiluted); and

+/- 2.5 ppm +/- 5% of calculated reading using dilution.

 

So, from the first, undiluted, sample, your nitrate range is 1.13 ppm at the low end to 1.68 ppm at the high end.

 

And, from the second, diluted sample, nitrate range is 1.14 ppm at the low end to 6.51 at the high end.

 

Dilution is probably something you'd only do if your (undiluted) nitrate measurement exceeded the range of the meter (that is, 5.0 ppm).

 

 

 

 

[Kaiser]

Thanks for your scientific reply
In this matter I am dumb
Whatever you explained I still didn’t get it

I already ordered the Hanna nitrate HR checkers
I hard this one easy to test and know the results


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[Origami]

Kaiser, simply put: When the sample tests within the range of the meter without dilution, use that measurement. So, trust the 1.40 ppm measurement. 

 

But, also realize that the 1.40 measurement has an accuracy error associated with it. That same sample in another meter or with another reagent might measure out to 1.30 ppm or 1.5 ppm. Same sample, different readings. But ALL within the accuracy specification of the device.

 

Only use the diluted sample if your undiluted sample exceeds the range of the meter. The instructions for that meter say you'll see a blinking "5.00" if that's the case.

 

 

[Kaiser]

I know the dilution part if undulate not reach 5ppm I don’t need to dilution
I’m dosing nionatro to reach higher nitrate!
Having low nitrate I’m having dino elgea
My phos was low too


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[Origami]

Got it. I think you do, too.

 

Good luck battling the dinos.

[Kaiser]

I’m really appreciate for you reply
I wasn’t sure about my test results

But your explanation makes sense to me
Now I’m know what’s my nitrate level is in my tank


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