yellowing leafs help plz

the leaves on the bottom of most of my plants the first true leafs are turning yellow and drooping. is this a nutes thing? ive only given them nutes one time about a week ago other wise just watering every other day every 48 hrs about any suggestions?

could be nute burn, nute deficiency, or overwatering, or worse root rot

def not over watering if i don't give them water every 2 days they shrivel up but as soon as they get watered they go back to normal

also using nutes at suggested strength should i maybe cut it in half?

thats normal