is that my plant is not drinking water and the leaf does not have it properly how should I act can I use calmag that a friend of mine suggested me to use calmag
Pictures are still yellow and hard to see. If you can get some pictures with the grow lights off it would be helpful. Picture that show the true color of the plant. Pictures that show the natural green leaf colors.
I'm afraid one of your problems is bugs, most likely spider mites.
Not sure why it is not drinking but I don't think it needs cal/mag from what we have seen so far.
You are 5 weeks into flower, some cannabis plants drink less water when the stretch ends. It may just be drinking less water because it is at the end of the stretch.