First Grow - Ginger Punch (Hobbit) Auto

Yellowing in young leaves' tips seems slow down, but now the old leaves are turning into yellow and dying. Since she's in 3rd week of flowering, I guess it's more likely because of magnesium deficiency because it has started as interveinal chlorosis on the old leaves and continued with yellowing and dying. It started in the middle of flowering so less chance to be N deficiency than Mg. I have to left the plants alone at home a few days. It's day 40, soil is still moist, I put a few pots filled with water into the tent to keep humidity as high as possible after the humidifier's water has finished. We'll see what's gonna happen. Day 37 - Watered with 1.5 ml/l Cal-Mag only. Day 39 - At the end of the day, watered with nutrient mix (2.5 ml/l Cal-Mag, 1 ml/l G.O Bloom, 1 ml/l G.O Bud) Day 40 - Foliar spray with 2.5 ml/l Cal-Mag