2 weeks calmag?

Hey guys posted yesterday. Indica strain. FF original plant and happy frog mix. Good air circulation. Temp between 72 and 80. Under 150 watts of cfl. 6500k. About 5 inches from top of plant. Up until today no nutes used. I posted last night and heard. Calmag def. So i nuted at half strength of a 2 % N a 3.25 % Ca 1.25 % Mg mix. I know its only been 4 hours since i fed but here are pictures.ACH]H]

Forgot to mention though not visible in picture but below my first node the stalk isnt nearly as thick as above the first node is that a problem?

Anyone have any suggestions?