Comments regarding Eleanor's of California

I had been using tap water (well water) for my house plants when I found VF-11. I thought that I had found the fountain of youth for my plants. I started the VF-11 around Christmas. Though I followed the directions for dilution on the bottle, my plants look terrible. My African violets have developed big yellow spots on the leaves and I think I've killed my Norfolk Island pine tree. It is loosing limbs weekly. This week, however, I have noticed that there are small new green leaves coming from the base of my violets (which is great!) but I'm not sure what to do about my little tree. Should I keep using the VF-11 or go back to the well water? I sure don't want to loose my tree but I'm not convinced that the VF-11 is the best for trees. I'm misting and watering on the same schedule before the VF-11- about 1-2 times a week depending on the dryness of the soil. Anyone have any ideas?
Thanks.