Cal-Mag deficiency? Leaves yellow with brown spots in soil, please confirm

[Penny21]

Hey guys, it looks like my plant has a magnesium and calcium deficiency, but I would like to get some input before I go to my grow shop to get new nutes. I attached a picture.

Here's some data:

-Auto Jack from Paradise Seeds 5 weeks old
-flowering for a week now
-noticed the yellow leaves today
-Soil: Plagron Grow-Mix with perlite
-18/0 light schedule with a MarsHydro reflector 46
-Nutes: Plagron Bloom 2.5 ML per liter once a week
Plagron Roots 0.5 ML per liter once a week
Humidity: ranging from 45% to 70% just after watering (this goes down quick though)

I don't think it's light burn because the LED (100 true watts) is away far enough. Also, since I live in Europe, can anyone recommend some nutrients to use? It seems that Advanced Nutrients Sensi Cal-mag Xtra is something I should buy, but it seems to have alot of nitrogen. I attached the ingredients for the Cal-Mag here. I don't want to use dolomite lime, since I can't remix the soil anymore.

Also of note could be that I castrated her a couple of times, she was showing pollen sacks (not nanners). That seems to be resolved though, no more new pollen sacks for 2 days.

Questions:
-Do you think it's a cal-mag deficiency?
-Is Sensi Cal-Mag suitable for soil during flowering because of the high nitrogen content?

Thank you very much for your input!

Penny

[GDTRFB95]

Im not the one to answer this.. but I will say they are going to ask you what your PH is going in and PH is coming out

[GDTRFB95]

Sorry to hear about the pollen sacks hopefully no more pop up.

[Masi808]

Purple stems tips and stripes i would say yes to cal mag

[Penny21]

Right, I forgot to add that PH after adding nutes is tuned down to 6.5, drain is 6.9

[GDTRFB95]

That sounds alittle high to me. I think calcium uptake is ok but mag iron copper maybe couple others get locked out if the soil is over 7

[GDTRFB95]

http://www.growweedeasy.com/ph