Should I flush?

Feminized SS AK47 has been vegging under a 400watt MH for more than 3 weeks now, it was going smoothly after her topping but it started to seem to tint in color towards lime-green, some of the plant tips are dark as you can see, amongst other signs of what would seem to me to be different deficiencies scattered throughout the plant but I guess it would make sense more if all nutrients were locked out. I honestly can't figure out whether she is hungry or burnt
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That is far from burnt plant in picture #3 is without doubt suffering from Nitrogen Deficiency.

400ppm is far too little nutes for them up it to at least the 650-700 range and see if they green up.
 
That is far from burnt plant in picture #3 is without doubt suffering from Nitrogen Deficiency.

400ppm is far too little nutes for them up it to at least the 650-700 range and see if they green up.
If you are talking about the lower leaves, you're probably right, although that was there before i feed it the 400ppm, which made it go all lime colored, so I am afraid of feeding it only to find that it's locked out and I end up making things worse. Pic3 doesn't give justice to the lime-green color of AKs leaves
 
I had that same problem, you gotta giver her food after taking cuts she needs enough to grow back into her womanly figure.
 
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