Your plants are one week old, and your watering 6 times a day?
If your in a rockwool and expanded clay medium you should be only watering once a day for 10 min.
Bring it down to once a day. Then after 6 hours stick your finger in your medium and see if it feels damp. If it does, it doesn't need to watered. If after 12 hours it still feels damp, your good for once a day.
If you feel the need to bump it up to twice a day. Water once after the lights have been on 1-2 hours, then again 1-2 hours before the lights go off.
Then when you feel they need a third watering, do it in between the first and third watering. Never water at night.
Plants store all their energy during the day, and grow at night. So turn your fans off at night as well.
All this ^^^ is basic hydroponics 101.