Is this MAG def?

popped on 1/3/2021
2.3x2.3x5.25FT MarsHydro tent
MarsHydro TS1000, 25 inch above
Grow Medium: Mother Earth Coco Plus Perlite Mix (70 coco 30 perlite)
Genetics: Greenpoint Seeds, Purple Crash
PH: 5.8-6.1

Nutes: botanicare CAL-MAG plus & general hydroponics series.

1tsp micro and gro, .5tsp bloom .4 tsp cal-mag
in 1 gal of tap water with 79 PPM
brought to 600 PPM with nutes

Looks like MAG def. Let me know if you agree or disagree. thank you.

Forgot to mention that the stems are purple/red lmk if you need a pic

bump

Do you feed daily to substantial run off?
Do you allow your fabric pots to sit in the run off?

Using cal mag with tap water? I grow in soil under led with tap, no cal mag required. Cocoa must use more
I assume?
Just asking so as to rule out lockout.
FF

Looks like it.

Solving your issue isn't as simple as adding more calmag........there are other factors that could be causing your problem.

MickFoster said:

Do you feed daily to substantial run off?
Do you allow your fabric pots to sit in the run off?

Click to expand...

Feeding daily with good runoff. They do not sit in it.

What info do you need to determine what the other factors are? If you even can.

runoff PPM is about 300.

Step by step though, should I add more calmag when I feed tomorrow?

FastFreddi said:

Using cal mag with tap water? I grow in soil under led with tap, no cal mag required. Cocoa must use more
I assume?
Just asking so as to rule out lockout.
FF

Click to expand...

coco requires more calmag, I appreciate the comment.

Also, new growth does NOT seem to be affected. These are all older large leaves with the problems. temp is set at 77-82F and humidity is set at 60%-70%.

I've never seen a magnesium burn so I did a search. Kind of looks like it. You've ruled out a lot of other things.

It sounds like you're doing everything perfectly.
I would up the calmag.
Good luck.