Calculation Of Seachem Flourish Nitrogen

LoneWolverine

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Jul 9, 2018
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Hi all,

I ran some calculation on the seachem flourish nitrogen fertiliser as it is difficult to access KNO3 directly in Hong Kong and I probably need to use the seachem flourish as my primary N source.

I know the product is mainly for nitrogen increase but there are presence of potassium in it. I don't quite understand the increase in Potassium and Potash as calculated


I understand that the NPK ratio in seachem nitrogen is 1-0-2, which is expressed as N-P2O5-K2O
Seachem flourish nitrogen 3 .png


I also looked up a little "fact sheet" as provided, which kind of confirmed that the K ratio in NPK is expressed in K2O
seachem flourish nitrogen 2.png


Do I understand it correctly that since K is expressed as K2O, a 1mg of Nitrogen introduced will also increase K2O by 2mg, and K+ by 2 x (39x2) / (39x2+16) = 1.659mg?


It appears that from the calculator the Nitrogen to K2O ratio is not 1:2 as suggested in the analysis above?
Seachem Flourish Nitrogen.png




Perhaps (very likely) i missed something from the analysis above, appreciate your time in reading and answering this!
 
Last edited:

Phishless

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Jul 13, 2017
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1-0-2? That's pretty close to 0-0-0 or nothing! If Seachem see's that as best ratio,then hydroponic fertilizers must be blazing hot. I have to remember that.

FloraGro is 2-1-6
FloraBloom is 0-5-4
FloraMicro is 5-0-1
Hydroponics fertilizers are not through the roof.
 

Phishless

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There is a professor on youtube who is a long time aquarist and he says the ONLY nutrients plants ever need in aquariums is iron and potassium..and the potassium you get from health food stores is less costly.
So far,I don't even see a need for Potassium. Only iron is a NEED of water plants..all else they get from water changes and feeding the fish..ammonia and phosphates,nitrates, you and the fish deliver.
It's only Iron..pref. Iron gluconate, and possibly a dash of a longer term iron.

YouTube, yeah I know pictures and sound.o_O
You may wish to expand on you reading here https://www.advancedplantedtank.com/fertilisers-why-bother.html
 

Phishless

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I'll stick with my chelated iron, no tanks without CO2.
Glut is more an algacide anyway.
Here's what DTPA does for me, not to mention other dosing.
e4714bb3a3202bc37377191819864651.jpg
 
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Phishless

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Sorry I changed that to glut.
I thought you mentioned dosing of Excel?
Or maybe that was in another thread.
Sorry, you mentioned liquid carbon, many use the term for Seachem Excel.