First DIY Grow: Special Queen 1#

Day 43: Plant looks healthy still. Growth has become somewhat slow recently. Actually I appreciate it as I have to wait with flipping until the autos in the tent are done... Stil no signs of need for food. BioBizz All-Mix seems to be fertilized super heavily.... Won't use it again for sure. Heard to handle nutrients. Day: 46: 2-3 middle-aged leaves show brown spots between veins and after that pretty quickly necrosis. 2-3 younger leaves show light interveinal chlorosis. Assumption: pH is slightly off. This can also be the case of Nitrogen is absorbed quickly, resulting in a pH drop in the soil. Additionally, our tap water has enough calcium but not enough manganese. I decided to add 3ml/l CalMag which also contains all other essential micro nutrients. I started to feed light portions (1ml/l) grow fertilizer and every two waterings Bloom+Top Max to prevent potassium and phosphorus deficiency. Run off pH was still 7.2 which would underline my theory.