What in the name of Jesus is going on.

Good day all.I have something going on that I haven't seen before and am having difficulty diagnosing.I used my hand scope to look for bugs but couldn't see any.I can easily see spider mites with the handheld loupe usually.So maybe something much smaller?My veg room and bloom room are showing a few leaves on each plant with these markings on the leaves which eventually shrivel up and die.Maybe a fungus of sorts??Anyway pics are included for reference.Rooms are awfully hot lately as well.Lights on the veg room is 28-30 and the flower room is 28-32...lights off both rooms are about 22 .Please help me identify peeps.It looks almost coppery in color.

Might be pm.

could be a nutrition problem, possible Ca...

I have had PM in the past and it looked much different .This seems to start as brown spots and moves quickly throughout the leaf (like 2-4 days to cover it all) .I feed 6 part remo nutrients for flower and 4 part for veg,ph my water to 5.6-5.8.Grow medium is pro mix bx.I have used the same feed schedule and formulations on previous crops without issue. I am a little worried it might be broad or russet mites as I have read that they are much smaller than spider mites.I hate not knowing what is hurting my babies.

Hi Alex,

Definitely looks like disease to me.
Whatever it is, i believe it to be fungal.

May be worth using a fungicide?
What stage of growth are you in?
Not in flower?

No pests?

I personally dont believe it to be nutrient related.

Hope you find the cause.

p deficiency

How many leaves are doing this?