Those darn spots on the leaves again.
Edit... After hearing what @GrowingGrannie had to say (thank you), I rechecked my EC levels and saw that they were way off. I had been measuring from the top and the water wasn't mixing properly, so much of the nutrients were on the bottom of the pail. aomce I mixed it, the EC came to about 2.5, TDS was 1500. Crazy.. If I were my plant, I would want to punch me! I emptied the water, and refilled it and added nutrients slowly, and got the EC to about .75. No wonder they were dying... OK. I hope that solves my "spots" problem. Thanks all for the help.
Going to disagree with my growmies here.... your pH is fine... anything between 5.5 and 6.2 is where you need to be and you're there. And I don't think this is a result of anything dropping on your leaves and burning under the lights... my opinion is that you need to add some calmag from the get-go, especially if you're using Fox Farm (I used Fox Farm when I grew in soil and absolutely hated it as I always ended up with a nitrogen toxicity from their Grow Big resulting in calcium deficiency)... I would suggest you knock down the Grow Big to 1/2 tsp and add 1tsp calmag because what I'm seeing is a calcium deficiency... and your EC is fairly high for this stage of her life...
Good luck
Looks like a cal-mag issue to me. I could be wrong. Quick question about your 💧 water.
How many ppms do the water you start with have?
I noticed Cal-Mag is missing from your nutrition line up.
My tap water is about 40ppms max. I use Cal-Mag to bring my water to up 200 to 250 then I adjust the rest of the fertilizer accordingly to the ppms I'm looking to achieve.
After the ppms is achieved, I bring my water PH to 5.5 to 6.5. I let it fluctuate no exact number along as it's within range.
Check my grow week 3 and week 4. Hope this helps happy growing
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statzzz
Original White Widow (IBL) 
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