What is going on

1st grow using soil, this is the first problem i've run into on this grow, they looked perfect up until two days ago

Been using a half mixture of Fox farm grow big and Dyna-Gro liquid bloom every 2 day. Do foliage spray with just water every day or so. Temp is holding around 80 degree.

Think it might be a nute burn havent taken any actions yet. Please help

I would stop the foliar feed now. I would neem them once to make sure you aren't growing anything there. Looks like a leaf rust mold. It might just be a calcium def though.

I was thinking it was a calcium def but wasnt too sure. Im stopping the foliar feed

It's probably too much high of a P/K ratio making the def though. They look healthy otherwise which makes me think that they are getting a def by way of burn if you know what I mean.

Looking at them a little closer, I am almost sure of it. I would flush them well and check the nutrient mix so that the ratio ends up n2.p1.k3.