Kno3 (Potassium Nitrate) Dosing Instructions!

[Randy Holmes-Farley Verified Community Expert]

Dear Randy, I made a solution with 20g dry KNO3 (101.103g/mol) food grade. Fully mixing this, it creates a "slurry" at the bottom, and when dosed, my skimmer goes bananas. It settles after a short time and if I dose the top without any "slurry" it doesn't affect the skimmer at all. Can I filter this out in any way, without affecting the solution?

I mixed with RO water in a clean glass bottle.

20 g in how much water?

What brand KNO3?

 

[Slettenreef]

20 g in how much water?

What brand KNO3?

1l of water, "Minerals-Water" is the seller / shop.

 

[Randy Holmes-Farley Verified Community Expert]

There should be no solids present dissolving 20 g of potassium nitrate in a liter of water.

Something is wrong with the product. Maybe it has other stuff in it.

 

[Slettenreef]

This is how it looks. I bought Sodium Nitrate instead now. How much can you dissolve in a 1L solution without any issue?

 

[Randy Holmes-Farley Verified Community Expert]

This is how it looks. I bought Sodium Nitrate instead now. How much can you dissolve in a 1L solution without any issue?

Sodium nitrate, more than 500 g/L
potassium nitrate , more than 300 g/L

The solids there must be impurities or something intentionally added