Well, we gonna need a little bit more info to help you out. From the pics I see...
Your in hydro,
your temps or light is too far away,
your using a clear container for your res,
and some kind of aluminum foil for your reflective surface?
What is your temp? RH? Lights? Nutes? PPM? PH? etc etc...
If you dont give us all the info, we are all just shooting darts at a donkeys ass in the middle of the night with blindfolds on.
Sorry if I came off harsh.