Hey jtrain, I missed a couple days due to a crappy internet conection. Your plant is looking real good, I'm hoping to see some explosive growth starting in a few days. If you want to up the nutrient level, taking a gallon of water out and mixing extra nutes to that gallon then adding that gallon back to the rez sounds like a good idea to me. I read somewhere [and it made sense to me] that when the water level goes down and the nute level also drops that means the plant is drinking more nutes than water so you should up the nutrient level. The other side of the coin is when the water level goes down and the nutrient level goes up, the plant is drinking more water than nutrients so you should lighten up the ppms. You've probably already dealt with adding your nutes, how did you do it?
Keep up the good work--gurgler