Potassium Nitrate – (KNO3)
March 5th, 2010
Potassium Nitrate (KNO3) contains 13.9% nitrogen (N) and 38.7% potassium (K) It is used as a source of Potassium and Nitrogen in planted aquariums, hydroponics and horticulture. Both nitrogen and potassium are macro nutrients – essential for healthy plant growth.
It can be added directly to a planted aquarium, or it can be mixed with water (preferably RO or DI) to make a stock solution. It can be mixed with other nutrients to make a bespoke fertilizer
If using the EI dosing system, typical maximum weekly uptake figures might be:-
Nitrogen (N) 4.5ppm. Potassium (K) 30ppm
Aquarium Dry Dosing
Adding potassium nitrate at the rate of 0.011 grams per ltr to a tank will increase the nitrogen (N) level by
1.5 ppm and the potassium (K) level by 4.3ppm.
Added 3 times per week levels will increase by:-
Nitrogen (N) 4.5ppm.
Potassium (K) 13ppm.
Aquarium Stock Solution
Adding 61g to 0.5 ltr of water will give a stock solution with the following analysis:-
1.5% N (6.7% NO3)
5.0% K2O (4.2% K)
Added to the tank at the rate of 1ml / 10 ltr 3 x week will add 4.5ppm N and 13 ppm K.
Posted in Aquariums