Mites? Deficiency? Light intensity? Help!

[hakop]

Hey Farmers

Today marks 21 days in flower
Went to start lollipoping and defoliating
And noticed on some of the plants there where these dots
First thing that came to mind where pest specifically spider mites
I looked through multiple leafs with my jewelers loop
Didn’t see a single thing

What else can cause this
I’ve dealt with mites before and they won
I don’t wanna lose again haha

Only the top few leafs are showing this issue on a few plants

Some info regarding the grow

In coco
Under Gavita 1700 leds
1000-1100ppfd
C02 1500ppm
LVPD is at 1.2kpa

nutes are 1400ppm (500scale)
Ph 5.9-6.1

Run off ppm is 1600-1700ppm
Run off ph is 6-6.1

Strain = Lemon cherry Gelato

Here’s some pics

 

[HerbalEdu]

very little Magnesium deficiency i'd say.

 

[hakop]

very little Magnesium deficiency i'd say.

I’m already supplementing 5ml botanicaare calmag should I up it to 7ml?

 

[Justlovetogrow]

Bit of light burn mixed with a touch of mag def that’s my guess otherwise they lookin good

 

[Fromunda506]

Light stress imo. Maybe some mag, but I would adjust lighting first and see if it improves before supplementing mag further. You should have plenty with what you are adding for this stage of growth Imo. Feed is running just a bit hot for her if her runoff is creeping up. May want to ease her off just a bit. Sometimes this excess salts can give you some funky nutrient uptake issues. Particularly p and k. Looking nice tho. A few leaves with blemishes is nbd as long as it is not an advancing problem. Cheers

 

[Imzzaudae]

Not Magnesium or bugs.

Light burn. This is a very powerful led. Way more powerful than you think.

This light needs to be at least 30 inches above the canopy. Power level 50%-60% for veg.
Maybe 70% last few weeks of flower never any closer or higher power setting!

Learn how to keep your plants short and bushy so the plant does not grow into the 30" safe zone k.
Should fix you right up.

Strip to the tip. Fast forward to 8 min.

 

[LoveGrowingIt]

Light burn.