dosing potassium nitrate, calculation check

ReefPharmer · 02/17/2018, 05:14 PM

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?

bertoni · 02/17/2018, 05:51 PM

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.

rjjr1963 · 02/17/2018, 06:55 PM

This is the calculator I use.

https://buddendo.home.xs4all.nl/aqua...dfield_eng.htm

02/17/2018, 05:14 PM	#1
ReefPharmer Registered Member Join Date: Jul 2011 Location: los angeles Posts: 1,836	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?

02/17/2018, 05:51 PM	#2
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	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

02/17/2018, 06:55 PM	#3
rjjr1963 Registered Member Join Date: Dec 2015 Location: Nebraska/Missouri Posts: 770	This is the calculator I use. https://buddendo.home.xs4all.nl/aqua...dfield_eng.htm __________________ 72x24x16 115 gallon under construction Current Tank Info: 40 gallon reef