N-DOC TNb always high?

[Chris Villalobos]

Does anyone have a TNb that is within Triton's acceptable range?

 

[Chris Villalobos]

 

[Deborah Jensen]

What does tnB stand for anyway? You have to have a chemistry degree to figure all this out!

 

[Deborah Jensen]

Does anyone have a TNb that is within Triton's acceptable range?

What does tnb stand for? You have to have a degree in chemistry to figure all this out?

 

[Chris Villalobos]

What does tnB stand for anyway? You have to have a chemistry degree to figure all this out!

TNb = Total Nitrogen Bound. Basically all N, both organic and inorganic.


https://www.lar.com/products/tnb-tp-analysis/tnb-total-nitrogen-bound.html

 

[Chris Villalobos]

TNb to total potential NO3 is TNb x 4.43 = Total Potential NO3

https://newsroom.unl.edu/announce/beef/5891/33379

 

[Deborah Jensen]

Thanks

 

[Dan_P]

Does anyone have a TNb that is within Triton's acceptable range?

I am in the process of obtaining an N-DOC test. I plan on obtaining an analysis before, after and a long time after a GAC change. Similar to what you did with skimmer off vs on.

I started compiling and graphing posted N-DOC results today. I will post when I get a few more. I have your recently posted results (Thanks).

 

[lapin]

Here is my results. I have high TNb. I assume it is common. I dont have any real issues with my tank.
What other source do they want me to add to the fill in the blank box? (From other source). My nitrate test results ?
What does High TNb mean?

 

[Dan_P]

Here is my results. I have high TNb. I assume it is common. I dont have any real issues with my tank. What does High TNb mean?

Saw your post. I will get back to you shortly. I need to add your data to my survey of N-DOC tests.

 

[lapin]

I also posted this in the chemistry forum.
https://www.reef2reef.com/threads/triton-doc-test-tnb-high.603499/

 

[Dan_P]

Here is my results. I have high TNb. I assume it is common. I dont have any real issues with my tank.
What other source do they want me to add to the fill in the blank box? (From other source). My nitrate test results ?
What does High TNb mean?

N-DOC provides total organic carbon and total nitrogen, organic + inorganic nitrogen (though not N2). By subtracting your nitrate nitrogen from the total nitrogen measurement Triton provides, you get an estimate of the nitrogen in the system that is not nitrate.

So, fill in the nitrate results and I think the web page calculates how much nitrogen that represents and subtracts it from the total. Triton claims there exists an ideal ratio of organic to nitrate nitrogen to shoot for. I have not seen the science to justify the claim.

The plot below shows how total nitrogen varies with total organic carbon for some R2R members. Notice the similarity in the total nitrogen values. Your system’s value is outside the collection of the points centered near 1.5 ppm. There are only two others in your neighborhood. I have no insight into what total nitrogen correlates with.

 

[lapin]

N-DOC provides total organic carbon and total nitrogen, organic + inorganic nitrogen (though not N2). By subtracting your nitrate nitrogen from the total nitrogen measurement Triton provides, you get an estimate of the nitrogen in the system that is not nitrate.
So, fill in the nitrate results and I think the web page calculates how much nitrogen that represents and subtracts it from the total. Triton claims there exists an ideal ratio of organic to nitrate nitrogen to shoot for. I have not seen the science to justify the claim.

Then they have: N/NO3 calculated 23.43
I had 12 at the time I sent in the test. So my total is 11.43?
I did not see where they changed anything when I enter 12.
The bar graph changes but I dont know what that means.

Thanks

 

[Subsea]

N-DOC provides total organic carbon and total nitrogen, organic + inorganic nitrogen (though not N2). By subtracting your nitrate nitrogen from the total nitrogen measurement Triton provides, you get an estimate of the nitrogen in the system that is not nitrate.

So, fill in the nitrate results and I think the web page calculates how much nitrogen that represents and subtracts it from the total. Triton claims there exists an ideal ratio of organic to nitrate nitrogen to shoot for. I have not seen the science to justify the claim.

The plot below shows how total nitrogen varies with total organic carbon for some R2R members. Notice the similarity in the total nitrogen values. Your system’s value is outside the collection of the points centered near 1.5 ppm. There are only two others in your neighborhood. I have no insight into what total nitrogen correlates with.

I don’t worry on how algae decides between organic & inorganic. Their is no ideal ratio in this equation. Algae & coral will absorb what they need. Growth is not determined by the most abundant nutrient, however, growth is limited by the least abundant nutrient.

 

[Dan_P]

Then they have: N/NO3 calculated 23.43
I had 12 at the time I sent in the test. So my total is 11.43?
I did not see where they changed anything when I enter 12.
The bar graph changes but I dont know what that means.

Thanks

The 23.43 corresponds to 5.3 times (62/14), what @Chris Villalobos alluded to. If your nitrate level is less than 23.43, multiply it by (14/62) and subtract that number from 5.3 which represents your organic nitrate level.

Make sense?

I still have no opinion about 1 vs 10 ppm organic TNb, but I might after I send skimmate for an N-DOC test.

 

[Subsea]

N-DOC provides total organic carbon and total nitrogen, organic + inorganic nitrogen (though not N2). By subtracting your nitrate nitrogen from the total nitrogen measurement Triton provides, you get an estimate of the nitrogen in the system that is not nitrate.

So, fill in the nitrate results and I think the web page calculates how much nitrogen that represents and subtracts it from the total. Triton claims there exists an ideal ratio of organic to nitrate nitrogen to shoot for. I have not seen the science to justify the claim.

The plot below shows how total nitrogen varies with total organic carbon for some R2R members. Notice the similarity in the total nitrogen values. Your system’s value is outside the collection of the points centered near 1.5 ppm. There are only two others in your neighborhood. I have no insight into what total nitrogen correlates with.

I have been doing algae filtration for 30 years, the Chinese > 2000 years. Seaweeds have adapted to Dynamic Equilibrium and will absorb whatever is in the water.

 

[Dan_P]

I have been doing algae filtration for 30 years, the Chinese > 2000 years. Seaweeds have adapted to Dynamic Equilibrium and will absorb whatever is in the water.

I witnessed how GHA can vacuum up nitrate and phosphate. How about organic carbon?

 

[chema]

My last N-doc analysis gave the following results:

TIC: 26,45 (-0,55)
TOC: 3,28 (-0,72)
TC: 29,70 (-1,30)
TNb: 2,29 (1,89)

Therefore, I also have high Tnb

 

[Dan_P]

My last N-doc analysis gave the following results:

TIC: 26,45 (-0,55)
TOC: 3,28 (-0,72)
TC: 29,70 (-1,30)
TNb: 2,29 (1,89)

Therefore, I also have high Tnb

Not challenging the high/low designation, but you are in good company. All but three posted N-DOC test results fall within a fairly narrow range. The green lines on the chart indicate 2 standard deviations from the average. Your system’s result falls within this range.

I find it interesting that only the three points that I designated as outliers seem to correlate with TOC.

 

[Subsea]

I witnessed how GHA can vacuum up nitrate and phosphate. How about organic carbon?

Inorganic carbon dioxide as a gas, combines with water to form carbonic acid then carbonate alkalinity then bicarbonate alkalinity then during photosynthesis, the organic & inorganic world come together and produce glucose.

Glucose is organic carbon for the reef.