Today we checked on our system and the results shown were amazing! The lettuce just keeps expanding at a fast rate. The leafs all look very healthy and the system is still performing to the expectations. We checked our water level and it was very low. We figured the since the plants are getting bigger, that they are starting to consume more water. We filled it back up to the usual level and then checked the pH. What is really amazing is that the pH always seems to be at a constant level of 6. Were not sure why it has been this way for this planting of lettuce; however, we are very happy with it. The system has performed very well in this second planting of lettuce and we can’t wait to harvest our plants next class to see if they taste as good as they look!