Something nefarious is going on in the grow room

Been battling with these plants for weeks now. Been holding off flowering until get it sorted but had to flip today. It does look like a mag def (interveinal chlorosis, hard, red stems) But i have been foilar feeding calimagic. I have cuts from them in perlite hempy, peat/perlite and organic. All showing same symptoms. Is this some kind of virus?

I'd say they are a bit lacking in nitrogen personally.

It does look like a magnesium issue.

http://growweedeasy.com/magnesium-deficiency-cannabis

Seems odd since you have them in 3 different growing mediums... unless the PH is off on all 3 mediums?

I've never heard of a virus that causes that.

This is whats getting me confused. I have everything in correct PH ranges. The only thing i can think of is the tap water and the molecules are too large to be absorbed efficiently and end up accumulating on the outside of the roots

Not on a city water supply where ur getting chlorine in that tap water are you? temps n airflow all normal? If it's room wide mebbe it's environmental not the plants? /shrug

rooms temps 23c no idea about water content. I'm in asia and no way i would drink this water. Everyone uses bottled water here. But i have grown (very well) using same water. I always let it sit out for at least a day

Another good place to go when diagnosing problems-

https://www.icmag.com/ic/showthread.php?t=11688

It gives some info on other conditions that can cause mag. lockout. IMO, it def appears to be a mag. problem. If you're flipping it soon, or have already, you'll want to get this corrected- pronto. Going into flower with any deficiencies will greatly affect your end results. And it's a bitch playing catch-up during the flower period (if there really is such a thing)!
Never works out well for me.
Best of luck!

wes2wright said:

rooms temps 23c no idea about water content. I'm in asia and no way i would drink this water. Everyone uses bottled water here. But i have grown (very well) using same water. I always let it sit out for at least a day

Click to expand...

hey wes if the water is not good for you it defitanly is not good for you plants..all diff mediums and the same problem.must be the water your using..use calmag as a soil drench.or you feeding them enough

Pic #4 has some leaves that looked like a bug has been munching on them, might want to check that out also.

I have been thinking its the water. I have just bought an RO filter. The leaves do get munch now and then, but its a lizard. lol Few of them where i am