Deficiency or Excess? Leaf tips coloring and twisting.

Update: the leaf edges are curling upwards and tips twisting, I think its a molybdenum shortage because all the symptoms match, however I have kept my ph above 5.5 so I don't know what else to do to fix it. I increased the EC slightly and she is still happy, but the molybdenum deficiency symptoms are still slowly progressing! Also I thought the problem might have been due to the reservoir being small so I upgraded to a 30+ liter reservoir which keeps the ph and ec nice and stable, HOWEVER now there is white foam in the res (but no odor, roots are white and not slimy...) I think the foam may be due to the enzyme nutrients breaking down old matter and maybe I didn't clean the new hydro system well enough. Anyway, anyone have any idea how to fix a molybdenum deficiency?