Possible health issues? Help please

Picasso510

Member
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The first three are pics of my Somango XL she seems to be yellowing from the oldest growths and the browning looks like nutrient burn but I can tell because usually nutrient burn occurs at the tips and is a little more pronounced these little brown spotting looks like a possible pest problem but I haven't found any bugs other then a couple ants and no signs of aphids either 20170906_003157.jpg
This plant is either bluecookies or Dosido I'm not sure which but for some reason here leaves have stopped fanning out and she looks like she may be suffering from N Toxicity I was hoping someone can help me out and input their thoughts on the matter.
 
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