I have started four new plans in a new hydroponics flood I am having a problem with the plants. They started off good and they just started going south. Here are a few pic's ... I am using the advanced nutrients grow A & B In the pic of all the plans the one in the front on the right is not being affected so I didnt thank it was chemical burn. The other three are all doing the same thing. That is the pic of the third pic from the left. I am feeding once every 4 hours for 30 min they are all in rockwhool.