It's over or under watering. Considering it's done it just after you watered rather suggests it's over-watering. The way you can tell is that the leaves look limp and lifeless if they're under-watered, if they're over-watered they're firm but curled under. Not to be confused with nutrient over-dose which is leaves curled right under like a rams horn.yesterday i posted a topic about my plant drooping, today it seemed fine until a few hours after i gave it the nutes im using (baby bio) could that be the culprit? if it is not diluted enough or something like that?