I have a serious problem with my girls. I've been watering them for the last 3 days and it seems like there leaves are starting to curve down ward. I'm running a 400 watt MH bulb. It's about 5' away from the plants. I have also been using distilled water. I've just started rooting nutrients but i had this problem before I started. I have a grow cabinet that is 2x3x6'6. It's fairly sealed and i run a fan for air movement. My temp in my cabinet is about 76 deg and the humidity is about 56%. I'm wondering if anyone could let me know what I'm doing wrong. Any information would be appreciated.