What Nutrient is lacking? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 11-06-2016, 05:42 AM Thread Starter
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What Nutrient is lacking?

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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post #2 of 5 (permalink) Old 11-06-2016, 07:51 PM
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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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post #3 of 5 (permalink) Old 11-06-2016, 09:02 PM
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My S repens is doing the exact same thing. Will start adding MgSO4 and see if I notice any improvements...


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post #4 of 5 (permalink) Old 11-06-2016, 09:05 PM
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Your leaves are a bit wrinkly too. Could be low Calcium.


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post #5 of 5 (permalink) Old 11-08-2016, 01:30 AM Thread Starter
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Quote:
Originally Posted by dukydaf View Post
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


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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