Don't sweat it brother.. look in again in a few hours and I'm sure they'll be reaching for the light I can guarantee that the 300ml hasn't done them any harm.. now just to let that dry out and feed again.. should be in around 24 hours.. and try to keep that cycle going.. my guess re the temporary droop.. which is not a serious droop from the pics btw.. is that's they just ain't used to that much water.