This is a picture of our system that shows the roots. The lettuce plants looked healthy as of last Wednesday. They looked to be about 3-4 inches high and very green. Surprisingly, the pH remained around 6.5. This was really good because Sandy prevented us from checking the system for a whole week. We were concerned that the pH would get all out of whack, but it didn’t. The temperature of the solution was 71.5 degrees.