What's up with this plant?

[Cosmic~guy]

I switched things up and started using canna coco a+b and canna coco coir. My plants have been in veg for about a month now. There under a t5 light and it's 12 inches from my plants. None of my other plants look like this one. I also have been adding a small amount of epsom salt like I did when I was using general hydroponics nutes, not sure if I should skip the Epsom salts or if there's another issue. Temp is in the 80s humidity isn't high.

 

[Cosmic~guy]

The first pic is a different plant that also had a little color change on one leave.

 

[ptyred]

that looks a little like heat burn... like your lights are too close... it happened to mine just recently with this new LED I got. It happend on the middle leaves not on the new growth, I raised the lights, and I never saw it again.

again, this is what happend to my girls, yours could easily be nutrient/ PH issues.

 

[Medfinder]

collect runoff water test ph. here is an picture that looks just like your plants
http://www.growweedeasy.com/ph-fluctuations-cannabis

 

[Cosmic~guy]

I added cal mag and it seems to have stopped the leaves from changing colors. I've had my plants almost touching my t5's before and never had problems, but I'll raise it up bit.
Thanks

 

[Super Sparkle]

Maybe ph