Iron deficiency or after effects from underwater?

I definitely underwatered this plant last week. A leaf turned completely yellow and i removed it. Ive been watching these other two slowly turning from their tips over the past week though.

What do you guys think is going on?

Looks like nute burn and calcium deficiency

Not calcium. Calcium def. looks like this: http://www.growweedeasy.com/calcium-deficiency-cannabis

It looks underfed. You may have damaged a few roots if it wilted too bad. That could account for it.

Definitely not iron def but could be a little Mg or S so a Tbsp of Epsom Salts/gal wouldn't hurt. Low iron affects the new growth first with the leaves going yellow from the center out to the tips.

When the plants dry to the point of the whole plant looking dried out and drooping the weakest/oldest leaves will usually yellow and drop off. I know because it happens to me fairly often.

Thanks for all the input