Is this calcium deficiency on my plants?

[Kbdwc]

I have three plants showing signs of stress
Plant 1

Plant 2

Plant 3

 

[GNick55]

what you feeding it?
and how much?
what growing medium?

 

[Kbdwc]

what you feeding it?
and how much?
what growing medium?

Not using anything fancy
I changed from 3.5-1.5-2.5 NPK
To 4-4-4 about a weeks ago
But also had signs of stress before that
But I have now flipped them to 12/12 and waiting on some tiger bloom NPK 2-8-4 so my N decreases and P and K increases

Water schedule is water, feed, water, feed so on and they have started drying out after 2 days now

I’m growing In compost
10l pots
I have 15 plants
1x 400w HPs
2x 600w HPs

Strains
Cookie dawg (tiny stress)
Purple queen (tiny stress)
Mendocino purps
Mimosa
Chernobyl

 

[Kbdwc]

Not using anything fancy
I changed from 3.5-1.5-2.5 NPK
To 4-4-4 about a weeks ago
But also had signs of stress before that
But I have now flipped them to 12/12 and waiting on some tiger bloom NPK 2-8-4 so my N decreases and P and K increases

Water schedule is water, feed, water, feed so on and they have started drying out after 2 days now

I’m growing In compost
10l pots
I have 15 plants
1x 400w HPs
2x 600w HPs

Strains
Cookie dawg (tiny stress)
Purple queen (tiny stress)
Mendocino purps
Mimosa
Chernobyl

Btw they look a lot greener in person think it’s the light spec that’s causing them to look light green