This my 2nd grow and I'm having problems figuring out what is wrong with my plant. My setup is: kind led xl750 light with blue light and uv spectrum at 100% and red spectrum at 50% intensity on a 20/4 schedule. Light is also 21" above the top of the plant. Temp is a high of 75degrees F and low of 64 degrees F at night. And is currently at 25% humidity. I am using roots organics original soil and half dosage recommended of these nutes, House-Garden soil A&B and roots excelurator gold and algen extract. It looked really good after 2 weeks and I've been playing with how I am watering it, being sure not to overwater so I let it dry out n it looked to be rebounding then the next day I would find the plant curled up. Watered it until some drainage from bottom of container and have been sticking finger 1-2" into soil to check for dampness as to not overwater. And she has perked up a bit but not what she was looking like a week ago. The 18th will be the 3rd full week since being planted. Next thing I was going to do is raise the humidity another 10-15% from research I was doing. If the strain matters it's purple kush. The 1St pic was taken about 24hrs ago n 2nd pic about an hr ago. Any help would be greatly appreciated.