AmnZhzanswered grow question 2 years 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.