I just built a hydro tower and transferred chard, kale and spinach seedlings from soil to the tower. Now they aren't looking too good :( I used Earth Juice - Grow (2 - 1 - 1) in the reservoir, the water is aerated, and the water pump is constantly on. Any ideas? I really don't want to lose my plants! The kale plants that I kept in soil seem to be thriving, so I'm not sure it's the temperature. The leaves are yellowing on the kale and chard, spinach seems okay so far.