Just trying to sort-out the N,P,K,KN03,KH2P04,K2S04... - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 04-22-2010, 06:23 PM Thread Starter
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Just trying to sort-out the N,P,K,KN03,KH2P04,K2S04...

Tell me where I'm wrong when talking about macros (N,P,K)
N = Nitrogen, = KN04 = Potassium Nitrate
P = Phosphorous = KH2P04 = Mono Potassium Phosphate
K = Potassium = K2S04 = Potassium Sulfate

These terms seem to be mixed-up in my tiny brain.

Thanks
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post #2 of 9 (permalink) Old 04-22-2010, 07:26 PM
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seems good to me . . . its the micros that got me all messed up.

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post #3 of 9 (permalink) Old 04-22-2010, 08:27 PM Thread Starter
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Tiny brains work slow

Did a little more research...

KN03 supplies N & K
KH2P04 supplies P & K
K2S04 supplies K

This is why some folks use KN03 & KH2P04 for their macros & don't need K2S04 at all. I'm getting there
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post #4 of 9 (permalink) Old 04-22-2010, 08:58 PM
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KH2PO4 is basically for P. You use such a small amount that the K is negliable. You likely on need K2SO4 if you are not dosing KNO3 due to a heavy bioload.

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post #5 of 9 (permalink) Old 04-22-2010, 09:08 PM
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Quote:
Originally Posted by Larry Grenier View Post
Tiny brains work slow

Did a little more research...

KN03 supplies N & K
KH2P04 supplies P & K
K2S04 supplies K
This is correct. A small note, for nomenclature purposes (I am not sure if it is just the font used), but it is KNO3 (it is a capital letter 'O', not a zero).

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post #6 of 9 (permalink) Old 04-23-2010, 06:15 PM Thread Starter
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This is correct. A small note, for nomenclature purposes (I am not sure if it is just the font used), but it is KNO3 (it is a capital letter 'O', not a zero).
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post #7 of 9 (permalink) Old 04-23-2010, 07:48 PM
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ok, i dont mean to jack your thread, but your thought process is the same as mine. If you have a tiny bioload could you dose just KNO3, and KH2PO4? If the KNO3 doses for N, and K, then all you need is the KH2PO4 for P right? and then all you need to worry about is dosing for micros?
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post #8 of 9 (permalink) Old 04-23-2010, 08:58 PM
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ok, i dont mean to jack your thread, but your thought process is the same as mine. If you have a tiny bioload could you dose just KNO3, and KH2PO4? If the KNO3 doses for N, and K, then all you need is the KH2PO4 for P right? and then all you need to worry about is dosing for micros?
Yes, many people just dose KNO3 and KH2PO4 alone for macros. Of course, then all you have to worry about is micros, as you mentioned.

Anthony


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post #9 of 9 (permalink) Old 04-23-2010, 09:25 PM
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Yes folks! It can be a bit crazy, but there is Potassium in all of the above. The level of K uptake can vary from tank to tank, so its need can be demanding in some situations more than others.

That said, K is the one thing that is unnatural to a planted tank. In KNO3 (yes its not a zero, its a letter), the N, Nitrogen, is what we are after. This can be naturally occuring in most aquariums through the basic Cycle. Ammonia (or ammonium) is providing N, Nitrite provides N and then of course Nitrate. P can be acquired through most fish foods.

So, in a lower tech lower light set up, sometimes dosing is not even needed since most of the nutrients can be had from what is already ongoing. The K can be supplemented in any form just to keep things nice and green.

In higher light setups, the demand for additional nutrients will go up, thus the supplementation of the standard macros (I incude C in the Macro grouping since Carbon is a major component of photosysnthesis, but others may disagree with me).

We are fortunate when we "mix our own" chemicals because the K is in so many compounds, thus the need to always use K2SO4 is subjective and not always needed when using other compounds.


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