Light burn, cal def? Both? Need experienced insight

Hey guys/gals,
I have a Zkittlez auto from seedsman. It’s in 2 gal smart pot with Royal Gold tupur mix which is a coco medium. Tent is always 70-75°F and 45-55% RH.
Right now it’s in week 12 total and about 4 weeks from first seeing it start to flower.

I currently water 2-3 times daily with General Organics BioThrive Bloom (2-4-4) at 8ml/gal and Calmag (2-0-0) at 7ml/gal. I use reverse osmosis water. It’s always ph’d to 5.8-6.0, most of the time right at 5.9. EC levels averaging 1.0 and around 700ppm.

For most of the veg period I had it under a cheap blurple full spec LED with 102w output. Right before flowering I added a SunSystem HPS 150 which did add some heat into the tent.
I do have an exhaust fan/carbon filter set up as well as a fan in there.

I know that some of it is for sure light/heat damage. I’ve lifted the lights as far as the tent allows as well as tied branches down as much as possible without snapping them.
I also had some calcium issues with it.
Just wondering if anyone could tell me if it looks more like a calcium deficiency progressing or more the light/heat. I’d imagine some of both? Not worried about it much just would like to know if I should try to tie down more or up calmag supplement.

Thanks for your time and any insight/advice!

Here are some photos:

next water test pH and ppm of runoff and let us know,coco right?my guess is pH too low and or ppm too high.

myke said:

next water test pH and ppm of runoff and let us know,coco right?my guess is pH too low and or ppm too high.

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Idk why I forgot to include that info. I test runoff usually every day.
Today after watering the runoff was 6.06ph, 1.2EC and 850ppm.
Depending if I water 2 or 3 times a day the runoff ph fluctuates between 6.0 and 6.5.
Always 5.8-6.0 going in.

Cwmoore577 said:

Idk why I forgot to include that info. I test runoff usually every day.
Today after watering the runoff was 6.06ph, 1.2EC and 850ppm.
Depending if I water 2 or 3 times a day the runoff ph fluctuates between 6.0 and 6.5.
Always 5.8-6.0 going in.

Click to expand...

How is temp humidity and air flow?

I jusr re read your first post,calmag should be good 7 ml but some do go with more.I HAD the same problem but in rdwc,I lowered the ec and added Mg Epsom at 60 ppm.seems to have helped.good luck.