Fox farm nutrients help

I am about day 70 from seed. I’m having trouble with what I think is calcium. I’ve flushed my ffof soil a week ago because I never have and thought my girls aren’t taking in the nutrients since growth has slowed down a lot. I’m growing northern lights autos. I’ve never used grow big since I heard ffof soil was hot, I’ve only started using big bloom, tiger bloom and 5ml of cal mag plus when I went into flower. I’ve given just under full strength of nutes twice a week with cal mag and ph water/cal mag inbewteen feedings. I’m still having a calcium issue. My question is am I supposed to be using grow big also? I read that you should stop using grow big when you go into flower. Need some help here pls

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Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)

  • What strain, Seed bank, or bag seed
  • Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
  • Vessels: Pots, Grow beds, Buckets, Troths
  • PH of Water, Solution, runoff (if Applicable)
  • PPM/TDS or EC of nutrient solution if applicable
  • Indoor or Outdoor
  • Light system
  • Temps; Day, Night
  • Humidity; Day, Night
  • Ventilation system; Yes, No, Size
  • AC, Humidifier, De-humidifier,
  • Co2; Yes, No

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Thanks!

Please be as complete as possible. If soil please tell us WHAT soil. WHAT light etc. It’s all important.

@SKORPION. You around?

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What have your ppm readings been? And they look close to harvest.