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What Nutrient is lacking?

955 Views 4 Replies 4 Participants Last post by  Kaen130, 
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My S.Repens was growing well, lush and very green in color for many many months.

Just less than a month ago, I noticed some leaves are turning yellow. I thought maybe it had grown too dense and affected the lights from reaching some of the leaves, so I trimmed away all the not so healthy part an let it grow again, which I had done a few times previously.

However, today I noticed some of the remaining leaves are turning yellow too...

I never do any changes to my dosing routine, except I have more plants than before.

Can any experts advise what is the Nutrient that is likely lacking? So I probably can try to dose slightly more of that.

Thanks in advance





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dukydaf
Hello Kaen,

It would help if you could provide a little more information. What do you dose now ? What is your GH ?

Yellow leaves are often associated with low available nitrogen (ie low nitrate). However what I am seeing in the images are white/yellow patches not the gradual yellowing common for N deficiency. I have seen similar symptoms when I limited Mg...

MgSO4 or epsom salt is easily available and does not cost much so I would recommend to start here and see if the symptoms dissapear. Aim to have around 5-10ppm Mg (not MgSO4) in your tank.

Hope this helps and if you need help with the calculations let me know.

Regards,
duky
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klibs
My S repens is doing the exact same thing. Will start adding MgSO4 and see if I notice any improvements...
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mistergreen
Your leaves are a bit wrinkly too. Could be low Calcium.
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K
dukydaf said:
Hello Kaen,



It would help if you could provide a little more information. What do you dose now ? What is your GH ?



Yellow leaves are often associated with low available nitrogen (ie low nitrate). However what I am seeing in the images are white/yellow patches not the gradual yellowing common for N deficiency. I have seen similar symptoms when I limited Mg...



MgSO4 or epsom salt is easily available and does not cost much so I would recommend to start here and see if the symptoms dissapear. Aim to have around 5-10ppm Mg (not MgSO4) in your tank.



Hope this helps and if you need help with the calculations let me know.



Regards,

duky
Click to expand...


Hi Duky, my GH is between 4-5

As for dosing, it is different from EI, but I had been using this formula for coming 9 months, everything was well until this current issue


DAY 1
K - 4.2ppm (KSO4)
PO4 - 0.5ppm (KH2PO4) - dose separately to prevent mix with FE
FE - 0.05ppm (FE 10%D)

DAY 2
K - 1.75ppm (Lushgro 5% KNO3)
NO3 - 2.0ppm (Lushgro 5% KNO3)
PO4 - 1.0ppm (KH2PO4) - dose separately to prevent mix with FE
FE - 0.04 + Micro Nutirent (Lushgro Micro)

Repeat the above + WC every 7 days



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