Hello growers!
I have been worried about this problems. I use autopot system (50% light mix ATAMI 50% perlite) and im growing 6 Northern Lights Auto RQS (4 weeks ) and the EC is around 0,5 now (1/2 of base nutrient for veg [ATAMI], 1/2 RootFast and 1/3 CalMag; since 18/03 in my reservoir) and the ph i maintain around 5.5 - 5.9 (everyday i check).
image 1: reddish branches
image 2: strange leaves
image 3: brown spots
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