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Plant Deficiences And Diagnosis

Peter F

Member
Joined
17 May 2009
Messages
38
I have noticed some of my plants are developing brown spots on their leaves. On closer examination they could be pin holes that grow bigger into brown rusty looking marks.
This is happening on the older leaves but is also noticeable on some of the new growth of Amazon Swords.
There is also green spot algae on some plant leaves. However, plant growth is still good.

I think it could be Potassium or Phosphate deficiency but don't know!

My tank is 180ltrs I am dosing daily with 5 mls of Tropica plant nutrition and I use
Tropica plant nutrition plus (with phosphates) once a week. I also inject CO2 and carry out 25% water changes weekly.

I am concerned about over dosing but do I need to increase it and if so to what?



Regards: Peter
 

ceg4048

Expert/Global Moderator
Staff member
Joined
11 Jul 2007
Messages
9,069
Location
Chicago, USA
Hi,
Any time there is structural degradation, poor CO2/flow/distribution should be the first suspect.

Cheers,
 

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