AquaRookie
New Member
I wish tropica will share informations in the form of ppm per dose it will be easier for me to control
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Tropica plant growth specialised fertiliser
- Thread starter Jaap
- Start date
all in ppm for standard dose, TPN and TSN yield the same micro nutrients levels
TPN
TSN has little more ClAquaRookie
New Member
Thank you !!!
(Apologies for digging up an old thread but I thought maybe this is the easiest way to get answer - also just in case anyone googled and ended up here having the same question like me ha...)
Stupid questions please could anyone have a sanity check with me:
1) Dosage of TSN is confusing here (mainly due to the 'Recommended Dosage - 6mL/50L/week above)
7.12 ppm NO₃
0.37 ppm PO₄
1.24 ppm K
0.47 ppm Mg
0.08 ppm Fe
That TSN dosage is per pump i.e. 2mL, is that correct?
2) Rotala calculator shows the same for K+trace mineral but not N/P - how/where do people calculate N/P here vs IFC-Fert calculator? (was it calculated through % based on molecular weights?)
Many thanks in advance 🙂
Stupid questions please could anyone have a sanity check with me:
1) Dosage of TSN is confusing here (mainly due to the 'Recommended Dosage - 6mL/50L/week above)
I just checked the IFC-Fert calculator v1.2b5, it is still the same to see per dose of TSN gives
7.12 ppm NO₃
0.37 ppm PO₄
1.24 ppm K
0.47 ppm Mg
0.08 ppm Fe
That TSN dosage is per pump i.e. 2mL, is that correct?
2) Rotala calculator shows the same for K+trace mineral but not N/P - how/where do people calculate N/P here vs IFC-Fert calculator? (was it calculated through % based on molecular weights?)
Many thanks in advance 🙂
MichaelJ
Member
Hi @Busesir,
The molecular weight of Phosphate (PO4) is 94.97 (O is 15.99) and Phosphorus (P) is 30.97 so the PO4 : P ratio is 3.06. (one P atom and four O atoms). By dosing 0.37 ppm of PO4 you get 0.37/3.06 => 0.12 ppm of P.
The molecular weight of Nitrate (NO3) is 62.00 and Nitrogen (N) is 14.00 so the NO3 : N ratio is 4.42. By dosing 7.12 ppm of NO3 you get 7.12/4.42 => 1.61 ppm of N.
(Technically with Tropica Specialized you dose NH4NO3 - I believe Rotala is based on the w/w% ratio of N published by Tropica some years ago).
Hope this helps.
Cheers,
Michael
The molecular weight of Phosphate (PO4) is 94.97 (O is 15.99) and Phosphorus (P) is 30.97 so the PO4 : P ratio is 3.06. (one P atom and four O atoms). By dosing 0.37 ppm of PO4 you get 0.37/3.06 => 0.12 ppm of P.
The molecular weight of Nitrate (NO3) is 62.00 and Nitrogen (N) is 14.00 so the NO3 : N ratio is 4.42. By dosing 7.12 ppm of NO3 you get 7.12/4.42 => 1.61 ppm of N.
(Technically with Tropica Specialized you dose NH4NO3 - I believe Rotala is based on the w/w% ratio of N published by Tropica some years ago).
Hope this helps.
Cheers,
Michael
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Great stuff Michael 😀 Many thanks!
(Just showed the missus that yes we are on a hobby forum and we do chemistry here too lol)
So indeed the Rotala calculator is less confusing (user friendlier) - as soon as one put in the correct aquarium size + dosage.
(Just showed the missus that yes we are on a hobby forum and we do chemistry here too lol)
So indeed the Rotala calculator is less confusing (user friendlier) - as soon as one put in the correct aquarium size + dosage.
Hi all,
The conversions backwards and forwards, from P to P2O5 and PO4 etc, are here: <"percentage for dry fertilizers">.
cheers Darrel
Yes, all the calculators & calculations are <"based on RMM">. You need to take the <"water of crystallization"> into account as well.
Unfortunately it is even more confusing for agricultural fertilisers, for historical reasons they have to quote the phosphorus (P) and potassium (K) contents as oxides, so P2O5 and K2O.
The conversions backwards and forwards, from P to P2O5 and PO4 etc, are here: <"percentage for dry fertilizers">.
cheers Darrel
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MichaelJ
Member
It may appear as such for some users, but the IFC Calculator is far more comprehensive and powerful.
Thats a given - regardless of the tool of choice 🙂
Lol your welcome. Yes, I told my wife that Darrel is my own personal water- and plant chemistry tutor
... gives me a bit of leverage that I actually learn stuff here 🙂Cheers,
Michael
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Oldguy
Member
A very good point. Not always clearly stated. I had to dig around for the water of crystallization of calcium and magnesium nitrates, four and six respectively, but I do buy from strange places.
I think fertilizers are now quoting both as oxides and as % elements, still misleading for nitrogen. If it was easy we would all be doing our own blends and where's the profit in that.