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Trying to understand what levels of nutrients I have.

The grumpy one

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Gloucestershire
Having done a bit of research, I think that my plants don't have enough Iron?
So I have started to delve into water chemistry!!!
I know it is probably over the top to go this complex, but I enjoy learning still.

The leaves seem to be going yellow at the edges.
Day063.JPG


Did a bit of calculations and came up with these ppm values for the tank water
NitratePhosphatePotassiumMagnesiumIronManganeseZincBoronCopperMolybdenum
NO₃PO₄KMgFeMnZnBCuMo
mg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppm
Tap water from supplier0.2500.0120.0060.0260.029
TNC Complete6.6400.6135.0000.0800.0800.0180.0100.0100.0020.001
Dosing
TNC Complete @ 0.6ml dose/daymgmgmgmgmgmgmgmgmgmg
0.0398400.0036780.0300000.0004800.0004800.0001080.0000600.0000600.0000120.000006
30L Tank daily increase ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppmmg/L or ppm
0.00132800.00012260.00100000.00001600.00001600.00000360.00000200.00000200.00000040.0000002
30L tank weekly dose ppm0.00929600.00085820.00700000.00011200.00011200.00002520.00001400.00001400.00000280.0000014
water change 33% weekly dose2.5000.1200.0600.2600.290
Total weekly dose2.5092960.0008580.0070000.0001120.1201120.0600250.0000140.2600140.2900030.000001
Recommended ppm2511020.250.050.020.020.0060.001

Are my calculations right?
Are those recommended ppm about right for a low tech tank?
Do I need to put extra of anything in?

Seems that table has corrupted, will look later to see what is wrong.
 
Last edited:
Is this a low tech tank?

if you dose 0.6ml of TNC Complete per day in a 30 Liter tank your total weekly dose will be:

N 2.1
P 0.28
K 7
Mg 1.12
Fe 0.112
Mn 0.025
Cu 0.003
B 0.014
Zn 0.014
Mo 0.001

Too low on everything...

If you dose 3 ml. per day your total weekly dose will be:

N 10.5
P 1.4
K 35
Mg 5.6
Fe 0.56
Mn 0.13
Cu 0.01
B 0.07
Zn 0.07
Mo 0.01

Which is much more in line with what you want, depending on your plant mass etc. and assuming your doing weekly 40-50% WCs.
 
Last edited:
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