I just dont know what it is. The roots on the near the top are starting to become dark/brownish and the leaves have developed some 'rust' spots on them with some blades becoming dried out. Im thinking I have root rot and either calcium or boron deficiency. Im using an aerogarden to grow with a little very little superthrive. Ive changed the water twice in in the res. and nothing has happened, for the good anyways...Anyone have any ideas or suggestions 
