holes in leaves..what is this?? pics..

I've got 3x bubba kush clones and 2x blue cheese clones veggin under 400w mh in organic soil. The light is about 15 inches from the top of the tallest plant, temperature gets up to 85 during light until my inline fan gets here. During dark cycle i keep it at 75 so that the difference isn't too drastic. I think its some kind of nutrient deficiency or lock up but the new growth coming in looks pretty healthy. I'm using tap water that sits out for 24 hrs and foxfarm grow big every two waterings. It can't be heat stress cuz the other ladies look great, and it can't be a bug eating at my leaves because I check them too often, I would've found the bug. I keep my tent clean and fresh air circulating at all times. Just threw the last two pics in so you can see what I have.

How many holes are there? I had a random hole show up on one of my leaves also and no bugs. I still don't know what happened to it but there have not been any more holes since so no big deal. Keep an eye on them and if more don't develop, you're fine.

i have dinged up a few leaves from time to time tying down or what not without realizing it and they looked just like that no worries

thats weird-- check for bugs

just to be one the safe side i would definately check for bugs.....also in picture 4 bottem row farthest plant to the right......you have some nutrient burns going on may wanna check youre soil,ppm,...ph

thanks folks! i'll definitely keep a good eye out for bugs. somebody told me that bubba kush is one of the tougher strains to keep happy. i've never grown it, this is only my second grow. its pretty badass that theres a site like this where growers; newbies and pros and whatever inbetween, can unite and share experiences and knowledge. mj brings people together, from all over the globe. i love it. thanks riu