Week 2 veg cannabis indoor grow ⛺

Getting near end of week 2 veg and they are all doing okay I have noticed some magnesium deficiency in some of the plants,in one particular strain,I have never grown any of these strains but I recognize the symptoms and I am rectifying this issue with some cal mag which I have already in my goodies cupboard,looks like this strain is a bit needy of nutrients especially magnesium.LST has begun and basically just pulled the tops down to the rim of the root pouch pots to expose the lower branches.