When we came in today we noticed that our plants have begun to turn brown on some leaves. There is also more of the brown substance on the plant bed and rock wool. We believe this is a build up of waste and/or mold which could be harmful to our system. We will need to do more research on this to determine the best way to solve this. We decided to move one of the rock wool outside of the cup to see if it made a difference in growth. We believe that the plants may not be getting enough nutrients so putting them directly in the water may increase the amount of nutrients they receive or it may drown the plants. The decision to make the change even though there are some risks was made because harvest day is on Wednesday and we wanted to see if we could get an growth by then.