African Violets and Gesneriads: is this fertilizer burn, 1 by nrandel

nrandel wrote:
I had my AV's in my office and they were quite happy. I retired, gave several AV's away and kept some. They weren't happy in their new home - AV's, new place, not happy. I moved again, big vanity in bathroom, east window, AV's were somewhat happy. Received as an early Christmas present a four level light stand, placed it in another room. Two months later I find out AV's not happy - powdery mildew. OMG, I was crushed. In a panic I cut all the leaves off that had powdery mildew and it left the plant with only the center leaves. These are now getting the mildew. I don't know what to do or why they're not happy. When I set the light stand up I thought the light was to close to the leaves, say 2-3 inches from the larger AV's. I researched the problem and it said to much humidity (NOT!) or not enough air circulation - go figure. What do you think forum readers?