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I thought they still sell it, just that it is now a controlled item and you need a license from the SCDF before you can purchase it.
Hello everyone,
Where can I buy potassium nitrate?
Dr Mallick does not sell the powdered form anymore.
Wahboy
I thought they still sell it, just that it is now a controlled item and you need a license from the SCDF before you can purchase it.
- eric
Potassium Nitrate is now restricted as an explosives precursor you need licensing from Singapore Police Force - Arms and Explosives division.
In other words can just forget about it.
Potassium nitrate can only be sold in Aqueous solution of below 5% concentration, but I haven't seen this being offered anywhere currently.
Calcium Nitrate (CaNO3) and Potassium Sulfate (K2SO4) both are what most aquarists are using instead of Potassium Nitrate now.
Oh not SCDF? My mistake.
- eric
Its really quite messy, some chemicals / compressed gases are under SCDF, some are under SPF...I inquired about applying for a permit for KNO3, but I just totally give up, its not meant for normal human beings, or small scale personal users to be able to get a permit apparently.
furry plant grower
Use Calcium Nitrate and Potassium Sulfate as Fuzzy suggested, Or Calcium Nitrate and Potassium Phosphate.
Plants also need calcium, and our tap water is very lean to expect any significant Calcium replacement through water changes.
HTH
Warm regards,
Lawrence Lee
brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
Philippians 4:8
Potassium Phosphate is probably a better pairing with Calcium Nitrate than Potassium Sulfate.
Hi Fuzzy,
I used APC's fertilator and found that Potassium Phoshate would add excessive amounts of Phosphate into the tank while adding only moderate amounts of Potassium.
Think Potassium Sulfate is still the next best alternative to KNO3.
- eric
My interest has wandered! Do U?
Huh... Potassium Sulfate OR Potassium Phosphate = Potassium Nitrate? Are you guys sure? Btw i'm currently using double dosage of Potassium Phosphate using EI method. Algae totally dont appear. For Potassium Sulphate, your shrimps may suffer if you add more when i was doing research on it during my fert test. I already stop using Potassium Sulphate.
Btw recently i saw this guy from another forum which he increase dosage on Potassium Phosphate and he gets good result and no algae issue. Previously he also follow the standard EI method but change after his research.
Last edited by blue33; 25th Jan 2010 at 11:50.
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Adrian,
I don't think we're saying they are equal.
But as alternatives to the now unavailable KNO3.
It is interesting to read about yours and the other person's success with Potassium Phosphate, think I will switch to that after I finish my current batch of Potassium Sulphate.
- eric
furry plant grower
In the past, I used to add a higher ratio of Potassium (K) than I do with Phosphate (P) and Nitrate (N) without adding Ca thinking that Ca can be gotten from water changes weekly. On top of adding micros, I had to really bump up the CO2 to ensure algae don't come a calling.
Now, I've been using a lot of Calcium from Calcium nitrate, and I increased the P using Potassium Phosphate, while not adding any extra K other than what I added thru KH2PO4. (trace elements etc are also added, and I've cut down usage of Mg to almost not dosing)
I found that plants are more stable in growth, without the need for additional CO2. Even my Aponogeton madacascarensis, which is reputed to go dormant, had been constantly putting out leaves for couple of months after flowering, even though I had not removed its spike (so happy to have it flower wor, this is not a common apon flowering. so how to bear to snip it?).
I think it is a fallacy that adding phosphates will cause your tank problems.
Warm regards,
Lawrence Lee
brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable--if anything is excellent or praiseworthy--think about such things.
Philippians 4:8
My interest has wandered! Do U?
Glad to hear another successful story on using Potassium Phosphate.I still using Magnesium Sulfate, result pretty good thought compared to Potassium sulfate.
What i find in Potassium Phosphate and those in the water column poo poo is one is organic one is not, so it gives a misleading concept that it will lead to algae growth etc etc....
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Ooh interesting, I'll have to play with that app. I've not tried Potassium Phosphate yet, as I still have some KNO3 leftover, but it seemed in theory that having your NPK+Ca taken care of all at one shot would be a win win situation.Originally Posted by bossteck
We're talking about using Potassium Sulfate or Potassium Phosphate in conjunction with Calcium Nitrate to substitute for Potassium Nitrate.Huh... Potassium Sulfate OR Potassium Phosphate = Potassium Nitrate? Are you guys sure? Btw i'm currently using double dosage of Potassium Phosphate using EI method. Algae totally dont appear. For Potassium Sulphate, your shrimps may suffer if you add more when i was doing research on it during my fert test. I already stop using Potassium Sulphate.
Btw recently i saw this guy from another forum which he increase dosage on Potassium Phosphate and he gets good result and no algae issue. Previously he also follow the standard EI method but change after his research.
I think generally that fertilizing a shrimp tank is a bad idea though.
That's why I've reverted to low tech (no ferts, no CO2, no rooted plants) for the time being, want to concentrate on breeding Sakuras.
The other reason I was hesitant to go with Potassium Sulfate was the concern that the extra sulfur in the system might lead to a spike in the anaerobic bacterial growth in the tank substrate, I need to do more research on this though.
My interest has wandered! Do U?
Currently i dont face any death in shrimp at all using this method even i dose high dosage.Btw i'm using Potassium Nitrate not Calcium Nitrate. I still find too much Calcium is no good.
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What shrimp are you rearing? I'm assuming you're injecting CO2 also?Currently i dont face any death in shrimp at all using this method even i dose high dosage.
Hehe another lucky hoarder. Problem is what are we going to do when the KNO3 runs out..
My interest has wandered! Do U?
Yes i inject high dosage CO2.
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I just bought 3kg of potassium nitrate, legitimately at $45 a kilo, was I ripped off? What was the normal price before the restriction? Cause it was way higher than I thought it should be.
What is its purity? Lab grade 99.9% pure KNO3 used to cost around $25 per kg.
Can you PM me the details? thanks in advance!
Ah ok, just as a quick update, bro Shaihulud's purchase method won't work for the rest of us. He is attached to scientific institution.
booo
So am IAh ok, just as a quick update, bro Shaihulud's purchase method won't work for the rest of us. He is attached to scientific institution.
booo
But them cops track exactly how many grams each person takes (although they don't ask what you did with it unless the volume is very large). Problem is, the institute also restricts access to the KNO3, so unless one has a very good reason to buy/take it
Still, I'm going to see if any vendors sells 5% solutions that'll bypass this restriction. Still beats the 0.3% Seachem N water
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