My plants leaves are starting to curl under and/or are drooping. Not sure what is wrong with them hoping someone can give some advice. The info below should tell you pretty much everything, let me know if there are any questions. Thanks!

E-indoor grow
E-soil
E-soil in 5 gal. pots
CSL-Fox Farms Sea Forest Blend
SCL-Down to Earth Biolive and Azomite
SCLR-6.0 ish
E-tap water that sits for a day
E-not sure yet
E- 6 weeks
E-Floranova Grow, Floralicious Grow, and Diamond Nectar
E-used in combination, tsp a gallon, applied once a week
E- 2 600w HPS, 2 ½ ft away
E- mid 70s to 80 during day, 60 to 65 during night
E- not totally sure, but thinking about 30 ?? 40 % never gets too moist
E-18/6 veg
E ?? a couple fans open airflow most of light period