Potassium Nitrate Grade
I have a few planted tanks and up until now I've been dosing liquid seachem Ferts. I have reached the conclusion that liquid fertilizer is very expensive.
After doing some chemistry calculations, I have figured out the right amount of potassium nitrate needed to create a mixture that adding 10 ml into 60 gallons will up my nitrate by 5ppm. I have made these calculations with the other ferts I intend to dose (potassium sulfate and monopotassium phosphate).
The place I'm buying potassium nitrate says that it is Technical Grade. I was wondering if it's safe for aquarium use. It is apparently the lowest grade (still above 95% purity if I'm not mistaken).
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