what's wrong?

i was first looking around for a solution in forum but my phone appareantly doesnt show most of the images so i could not compare my plants. Any way they are 3rd day into flowering and 1 plant has very dark green leaves and after i watered it a hour ago, it started crawling its leaves down. What could be the problem and what should i do about it? Growing in biobizz lightmix and useing biobizz nutes.

You can see these leaves turned down on the bottom of the pic

It could just be over watered.

Very dark green tends to be caused by too much nitrogen.

overwatered

I agree overwatered. And dark green leaves is a sign of nitrogen abundance like bud tipps said.