Hello i have two plants same bud (Train Wrack) , At one of them i have this problem ->a purple leaves (image 1 ) and at the second yellow dots (image 2 ) , They are in 4 week of grow veg , I use 2 hps 250w 16/8 , i only used rizotonic for stimulating roots , water ph 7 all the time . Please tell me what to do , Thank You ! I'm panict , please tell me if it's serious problem .
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