Calling the Hammer

After the defoliation last week the girls are still growing but the new growth is starting to show what I believe to be calcium deficiencies. I am already feeding CaliMagic at 1tsp/gal every grow. I know the LEDs cause the plants to need more so I am going to try and bump it up to 1.5 and see if that helps the spots and leaf growth. I am tempted to start using some Grow Big, I have it but am avoiding using it because I dont want Nute Burn or Nitrogen Toxicity. Also part of the internet says it kills all of the microorganisms in the soil. If you have an opinion, please share it. Or am I being impatient and this is till the post-defoliation lull? Time will tell!