MG defeciency or bugs?

I came home from work tonight and found these on 3 of the fan leaves.

I am thinking MG deficiency, but its my first time with any problems and hope its not spider mites. I dont see any webbing around the plant anywhere and the rest of the plant looks fine as well as does her sister right next door.

this is the plant the leaves came from. Its a SleestackxSkunk from DNA genetics



these are the leaves. The underside it has pits that look like they have been eaten away but not all the way through, only like the first layer of underbelly.





Help?!?!

Or you soil or water??? If your water check ph check tds and check water temp. If those things are in range then you have a fungus. Which is rare but not out of the question. Im not a soil dude but ph, fert, and temp plays an important part in growing good pot.

That really looks like bugs; def not Mg deficiency (see my link around page 5 or so for classic Mg deficiency). Not all spider mites leave webs; thrips are also possible.

The other thing that sorta looks like is ozone burn -- don't have an ozonator in the room, do you?

no ozonator inthe room...whats good for the fungus??

jesus of Cannabis said:

no ozonator inthe room...whats good for the fungus??

Click to expand...

That's not a fungus -- high up on the plant would be the last place for fungus to show up.

Inspect the undersides of your leaves carefully; preferably with magnification. Mites and thrips are tiny.

Sure looks like Spider Mite damage to me. I use Neem to control bugs, but it's not a quick kill insecticide... more like innoculating your plants for longer term protection.

My guess is it's either a calcium deficiency or overfertilizing.