Gave each of them 2,5 liters of water with some nematodes and molasses to prevent from insects. Will water every 5-7 days until flower.
Light deficiency/stress on BBM#1 seems to cure very good.
I don't believe your soil is depleted. Roots cant absorb the nutrients that are there when moisture levels aren't correct/ theres not enough dry out. The small root hairs begin to rot when the average moisture is too high. You might have to slightly adjust your watering amount to less, or adjust the time between waterings.. Thats my 2 cents based off what I see