Why are my leaves pointing down?

My leaves on this one plant are being forced down. The plant IS NOT drooping, cause the leaves and the texture of the leaves are still vibrant and solid, not soft and droopy. This is the only plant doin it 2, as u can see.

i dont have much experience but when i had my last grow one of my plants would do this when ever it was thirsty. then it perked right up... just a thought

in DWC the medium-probably rockwool in your case-should not be getting wet. also looks like you have some fert problems going on-leaves are very dark green and the lower ones are going yellow. when was the last time u flushed? ph in rnage-provide some more info like nutes as well