Deficiency or toxicity

xX24nuggetsXx

Active Member
Hey recently my 1 of my plants has started to turn light green/yellow and the leaves seem to be dying in the middle and then curling up and completely dying is this a deficiency or a toxicity?

I feed it 900ppm of canna nutrients
Grown in coco watered 1 once daily 2.5L
Light sits 18 inches above top of canopy getting 600 par
Run off is at 6.1ph and 700ppm

cheers:peace:
 

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