First grow...advanced set up...curling leaves...please reply.

Recently I just started growing about 8 different strains of mj. I watered the plants the first 2 days I had them and a few of them have leaves which curl down. They don't look bad other than the curling leaves. I am using micro, bloom, and grow mixed properly and under 2 T5s (48" floro). Am I watering too much and how often should I be watering if I am. Using water from a R/O reservoir. Ph is good and ppm are about 140-170 upon watering. The water is roughly 68-72 degrees f. The plants are about 1 foot tall and most of them are in root cubes. The cubes seem moist today (9/13/10) and I have not watered them since 9/11/10. Any advice is welcomed.

Thanks

there is no 'watering too much'


you want to keep the medium moist at all times, but not saturated to the point where air is excluded. as long as your medium has some good drainage going on you should be ok

and the leaves curling down is usually a sign of nute burn

Thanks a bunch!