End of week, I noticed yellowing occurring at upper leaves on auto 2. This being a super charge soil, I figured magnesium might be deficient since I donβt supplement with bottled cal/mag. Gave a thorough watering with RO supplemented with Epsom salt. Two days later auto 2 greened up a bit. More importantly new growth is not yellowing. Iβll continue to water using Epsom salts until prior to harvest.