Nutrient Deficiencies?

I have two mother plants that are starting to show signs of deficiencies at the bottom of the plant. I have been through all of the guides, but wanted to get some expert opinions on what these deficiencies may be and how to cure them. Pic 1 is from an NYC Diesel about 6 weeks old and pic 2 is from a Casey Jones about 8 weeks old. The plants look generally healthy otherwise except the Casey Jones also has leaf tips twisting towards the top of the plant. Here's my setup:

T5 CFL's (six bulb, 55 watt each)
Fox Farm Ocean Forest Soil with Light Warrior and extra perlite
soil ph is around 6.5 and ferts ph balanced between 6.5 and 7
All water is RO

They've been fed with age old grow, cal-mag, and molasses. At first they were getting half strength, but recently increased to full because of N deficiency. Theories
 

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