I'm using Pure Blend Pro Grow in an aeroponic system at a rate of 5ml/gal. I'm growing tomatoes and peppers. It seems to be burning the tomatoes, so I backed down to 2.5ml/gal. It still seems to be burning the plants and I am starting to doubt this brand of nutrients. In the past I have used general hydroponics 3 part system with no problems. Has anyone used pure blend pro before, and at what concentration did you use it? I was hoping to use an organic hydroponic nutrient, but after further reading, it appears that even pure blend pro is not truly organic.