AmnZhzanswered grow question 3y ago Hello mate, to me its cal mag def, these type of leds make the plant need more cal mag, you are using very little for your week. I use the mars hydro and i put 2.5 ml per lt of Advanced Nutrients Calmag, while the max is 2.00 ml per lt. Increase your cal mag and everything will be fine. I grow only autos check my diaries.