!!Leaf problems!! Seeking advice

Hey everyone. I've got some plants here. They seem to be going well. But I'm having little issue is like to fix before it gets out of hand. I have rust spots and yellowing I can't place my finger on the issue. Here's my specs.

9 plants grown from seed 45 days old
600 watt mh
3 gal containers
Nutrients are GH flora line (just started using them slowly increasing strength)Soil is a mix of root organics
I water them every 3 to 4 days or pot is light
Ph is in between 6 and 7

So I recently did a foilar spray with cal mag. Haven't really noticed a difference here are some pics to help. Maybe it's a pest problem. I can't tell. They look healthy from afar but up close there is a problem. Any input will be appreciated.
Thank you fellow growers.

I don't know of a pest problem that warps leaves that are shown in the first pic of leaf on the left. Guessing it's a fert problem... Good luck!

First of all thanks for the quick response. I've only used the ferts twice. Once quarter strength. And once half strength. Also Not all plants are showing this issue.

The first 2 things i would be looking at is Nute Burn or Mag Def.

GorillaGrowa87 said:

First of all thanks for the quick response. I've only used the ferts twice. Once quarter strength. And once half strength. Also Not all plants are showing this issue.

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Is it predominantly on the lower leaves?

I notice the one in the doorway is kind of directly across from your fan and the damage is concentrated along the tent wall. I have had my leaves get windburned and look similar. Is this on all of your plants or just at isolated locations?

Cool2burn, it's sporadic completely random. New growth old growth upper and lower.

Buyyouabeer, I move the plants around frequently and just moved these into the tent 2 days ago. So the fans have just changed. The plant that is closest to the fan actually doesn't have any of these symptoms.

Once again thank you for such quick responses. You guys rock.

honestly it looks like a calcium or magnesium deficiency to me but its strange the other plants are not showing it. did you do something different to this one?

Nope same everything for all plants. Only a few are showing these symptoms

I am using RO water, but I mix in cal mag every time I water

Anyone else have any ideas?

GorillaGrowa87 said:

just moved these into the tent 2 days ago

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I missed this earlier, doing some Perry Mason here. This damage just didn't happen in a few days it was in the previous environment; what was the situation before hand? Not sure what to think, it doesn't really match any nutrient +/-.

Buyyouabeer, you may be right about the Wind burn. I just did a little research and turned my fans off the plants. I'll let you know if it works. Thanks!

Have you ever spilt nutrient solution on them? I see a lot of white reside on some of those leaves.
Also once a leaf gets damaged it will never fully recover. If it gets pinched between pots or if fans to high it may get damaged from rubbing up against a wall or something rough. Just a thought.

I see now that you sprayed them with cal mag solution.

My humidity is at 30 percent could this be the issue?

Kinda looks like you might have some PM(white powdery mold) on those. I had it a few weeks back and looked similar to the lil white specs all over your leaves i used a tspn of 3%hydrogen perox in a 32oz spray bottle and misted them real good gone in 2 days but my leaves didnt have those wild grean spots like yours mine had a few burnt and contorted leaves but they have since gotten better.