some one more experience my come along and correct me, but personally i believe you may have over watered them. and i don't think you should feed them any nutes. i would give it a day or two and see if it gets better before you do anything that could compound the issue.
also its not so clear from the photos, but on picture number 1, bottom left. where the leafs appear to have some yellow/rust coloured spots. i had a similar issue where i thought it was nute burn. but it turned out to be a calcium deficiency...so it could be that.
but as i said, im not 100% sure. someone more experienced will come along soon and give you a definite answer.
best of luck with the rest of your grow!
may the bud be with you