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Old 02/17/2018, 05:14 PM   #1
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Join Date: Jul 2011
Location: los angeles
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dosing potassium nitrate, calculation check

hi guys
my 300g tank is running super low nitrates. I bought some KNO3 (from NilocG) and want to raise NO3 reading to 5ppm.

KNO3 is ~ 0.61% nitrate so adding 10 grams would be adding 6.1g nitrate = 6100mg NO3 to 1200L=6100mg NO3/1200L volume= 5.08PPM KNO3

Is that correct? If so, I can add it as dry weight into the sump?

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Old 02/17/2018, 05:51 PM   #2
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KNO3 should dissolve well, although I'd mix it with a bit of RO/DI to prevent particles from landing on animals or failing to dissolve.

That math looks fine to me.

Jonathan Bertoni
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Old 02/17/2018, 06:55 PM   #3
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Join Date: Dec 2015
Location: Nebraska/Missouri
Posts: 622
This is the calculator I use.

72x24x16 115 gallon under construction

Current Tank Info: 40 gallon reef
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