Hey, 1st post! I need help, my plants leaf edges are curling up. There are current;y 4 plants, roughly 3 weeks from germination. Using distilled water. Using 400w HPS in closet (4x3x7) with 2 fans on, and door open. Using promix BX, added a tiny bit of perlite. Plants are about 14" from bulb. Last watering was less than 1 week ago Temps 80f plz help!