Potassium Nitrate Grade - The Planted Tank Forum
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post #1 of 4 (permalink) Old 02-24-2019, 07:35 PM Thread Starter
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Potassium Nitrate Grade

Hello everyone,

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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post #2 of 4 (permalink) Old 02-24-2019, 07:55 PM
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Technical grade should be fine but many places see 99% purity salts at very low costs. you can find these on amazon.com and other web sites. Nilocg.com is also a good source.
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post #3 of 4 (permalink) Old 02-24-2019, 07:58 PM Thread Starter
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Quote:
Originally Posted by Surf View Post
Technical grade should be fine but many places see 99% purity salts at very low costs. you can find these on amazon.com and other web sites. Nilocg.com is also a good source.
Sadly the only way for me to buy and guarantee I get it, is to buy locally. In my country these chemicals are highly regulated because of the risk that they'll be used in bombs. If I buy a large amount over amazon it probably won't get through customs...

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post #4 of 4 (permalink) Old 02-24-2019, 09:22 PM
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Some stump removers are pure KNO3. The Spectricide brand that is normally found at Lowes is one example. I've used it for years without issue.
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