Hi fam, I’m not sure if the color variation is from different pheno’s or if there is a nutrient problem. Both plants have been fed the exact same but look way different. And the light colored one is getting some yellow/rust spots. What’s your thoughts?
Hello @diamondtrichomes ! In general when growing with organic nutrients we don't measure ppm. It is pointless. We measure ppm at free mineral nutrients. The reason is that organic nutrients have a lot of organic matter diluted in them. That diluted organic matter raises your ppm but it gives no nutrition to the plants. So you are measuring ppm with no nutritional value. Any way if it was a mineral nutrient 450 ppm is very low for a plant at third week of flowering. You should be at 600-700 ppm ( if you were using mineral nutrients ). I really don't see any sign of over feeding and i don't think you can over feed with the dosage that you use. All i see is a hungry plant for nitrogen . Maybe that pheno needs more food or maybe the other plants will show signs of deficiencies later. Happy growing ! :facepunch:
diamondtrichomes 
Thanks for that answer @mad_scientist that makes sense!