2nd grow - Durban Poison

Well, this week I left my iphone on the side of my truck and drove away without realizing it. I ended up smashing the screen and had to get it replaced. I thought it was all good, but my main camera is not working, so these pics are taken with the front facing camera. I apologize if the quality is not as good. These cell pots have been drying out quickly, so I am struggling with finding a balance between over and under watering. The gnats are already showing up in force, so I am thinking that I may be over-watering. I have also introduced Recharge into my watering this week as well. I just topped the plant yesterday at the 5th node. Therefore, the height reading will be a little lower than the true height. Please let me know if you see any issues. I do see red/purple stems. I wonder if it is a lockout due to over-watering or maybe a cal/mag deficiency? I noticed there was some curling of the leaves, mostly on the sides. I raised the light up 3-4 inches. let's see how it goes.