very dry leaves

can someone point me in the right direction..... ive been listening to what the person at the grow shop tells me but im not sure me and her is on the right page.....

what are the temps in the room?

always 78 degrees

I'm a hydro guy, but looks to me like they are rather thirsty. What are your watering intervals?

Unity

Well you definately have droopiness which is a sign of over/under watering but that one plant on the left side looks pretty good. What is your watering regime?

when i started watering it was every 3 days...... but my supplier told me once a week so i changed it to once a week.... but ive since changed it back to when they look dry

I think you should repot them into larger pots, some of them look a bit starved for nutes.

fuck a watering schedule, get hands on with those girls. Check the soil with your finger, or toothpick if you dont like getting your nails dirty. if it's still moist down 2-3", wait longer. plants will tell you when they want to be watered. it's easy to over water because the top could look like a parched desert while the innards are sopping wet.