I have been flowering these girls in a 4x8x6.5 tent with 1000wt hps and 2 700wt leds keeping 80 degree temp 50% humidity using botanicare kind line up at 75% strength of recommended dosage and my leaves are turning brown and hard and crumbling off. I don't know what im doing wrong! im not sure the strains but there are a few different ones in there. plz help I don't want to loose all this hard work at the end!!!