Lost 3 girls so far, more on the way at this rate

The ones doing badly were in weird pots with poor drainage, the tan ones, they've gone downhill since I sprayed Lost Coast Plant Therapy the 2nd time it was at night over 80 degrees and I think I fried em, not to mention drowning the roots a few times.
Using GrowMore 30/10/10, pH around 6.6-6.8 off well water, considering spraying them with Magic Green but I don't want dirty weed, has to be clean.
I've given them only plain water since I transplanted into smartpots Saturday night, worried because I did not give any vitamin B when transplanting and they have either stayed the same or gotten worse.
Before transplanting they were doing great.
I have lost 3 of the GSC crossed with a Glue, they were doing the best
The Gelato/Gelonade is not doing super great but hanging in there, have pinholes (bugs?) through some fan leaves but it isn't bad.
This is my first attempt at growing and it would seem I'm failing pretty badly.

Not failing, learning

what type of soil is that? how much of that 'GrowMore' are you using, per gallon? These plants are kinda hard to kill, so there's most likely a problem with your soil, your nutes, or your environment otherwise, I see a few healthy plants there, so whatever you are doing for those is working.

just to point out too, transplanting didn't kill them, especially not mature plants like those, a little shock sure, but nothing it wont pull out of.

the soil i believe is something called "promix" purchased from a big soil dude, it is technically used soil as it was used in a previous grow, i was given it freely. I was using 3 teaspoons in each gallon of water, my tester showed about 540ppm, that doesn't seem too heavy to me but i'm a noob.
do you think it is safe to resume giving the 30/10/10? Also I'm considering CalMag if that would be okay, I purchased B1 transplanting solution but it has been 4 days since I transplanted so not sure if it would help the roots at all