Do I have a Calmag deficiency or other nutrient issue

[Whip991]

Hi there,

Last week or so one of my plants is showing signs of being ill.

It's critical and in flower about3.5 weeks.

Have you seen this time of issue before?

Plants on 400watt hps, humidity is around 50% and temps are around 30 degrees C.

I always try to have the water at 6.5 ph
I give calmag every time I feed 10ml/10liter as I have hard water.
Feed Terra Flores 50ml/10liter
Canna pk1314 15ml/10liter
Every 3-4 days

I also have another plant in the tent and that one is not showing any issues.

 

[BurnzYzBudZz]

Can we see a picture of the new growth? Have you scoped for mites?