Verification Requested –– Stock Sodium Nitrate Solution Calculation

[nickkohrn]

I am going to be dosing sodium nitrate to my system for the first time, and I am requesting that my calculation be verified.

I have a system that contains 100 gallons of water, which currently does not contain detectable nitrates. Using this calculator, I believe that I have the correct measurement in order to create my stock solution.

Since the bottles contain 113 grams of sodium nitrate, I used that as the `Amount to add` value. However, based on its potency when compared to potassium nitrate, I need to use 85% of that value, resulting in ~96 grams of sodium nitrate per 0.5 gallon (1,892 mL) of water to create a stock solution. So, I could create 1 gallon of stock solution by mixing 192 grams of sodium nitrate with 1 gallon of water.

As for dosing, I would need to dose a total of 51.7 mL to my system of 100 gallons of water to reach a nitrate measurement of 5 parts-per-million.

Is that correct?

 

[JimWelsh]

Yes, you are doing the math correctly.

 

[nickkohrn]

Yes, you are doing the math correctly.

Thank you for taking a look and verifying. I greatly appreciate your help!

 

[PatW]

I just put half a cup into 1 gallon RODI. I have a 300 gallon DT with skimmer and thriving chaeto. I dose 2 tbs of nitrate stock solution to maintain 1 ppm nitrate. In your system, you would dose 2 tsp of my stock solution for the same dose. But there are a pile of variables here so my dose will almost certainly not be the same as yours.