Again, like many have said, there are impurities in your KNO3, or your KNO3 isn't really KNO3 at all. Is it white in colour? If it's pink, it's a different chemical, probably potassium muriate (aka muriate of potash). That one only provides K, and it is rather hard to dissolve ime.
The juggling apprentice fish
Err... Had tried to resist posting... Ok, all Potassium (K) salts are soluable. I think almost all nitrates too. As such, do check what you had added in.
After note: The solubility still depends on the amount you try to dissolve, as mentioned by bclee. There is only this much a certain amount of solvent can dissolve a solute, no matter how soluble the solute is.
Last edited by Justikanz; 20th Feb 2006 at 13:58. Reason: Add in after note
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How much KNO3 you are adding to how much water?Originally Posted by samuelgoh
The solubility of KNO3 is only about 35g (~7 teaspoon) per 100ml @ room temperature. Anything more will not dissolve.
Even if you heat it to dissolve more solids, it will crystalline out again if you cool the solution.
BC
that's wat i did nv dissolve fully...Get a small bottle like a 500ml mineral water bottle. Pour the KNO3 with the 300ml of water then cap it up. Shake it hard for a while. It definitely will dissolve fully. You can pour it right in your tank after that.
failed...
i added about 27 i think.
cos that's wat i need to add to get my recommended amount of ppm..
Why don't you just dose direct to the tank?
27g? How much water?
BC
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