Allow me a moment to communicate with others who live in the real world where poor water quality is what we have to deal with. Not everyone has access to good quality water, nor is it practical in many circumstances to procure, transport or produce it in sufficient quantity to support more than a few plants. I can provide water low in total dissolved solids for my miniatures and seedlings, but most other plants have to get by on 400ppm TDS tap water high in carbonates. That is the reason I repot Paphs 1-2 times a year. No amount of flushing with that water will do any good. Excessive fertilizer or over-watering or choice of media has nothing to do with it, nor any other controllable aspect of culture. As the carbonates build up the only way to get rid of them is repotting, and that allows me to grow some pretty decent Paphs much of the time. Twice in the last 6 months I have gotten emails criticizing me for recommending frequent repotting of Paphs, even when I mention water quality as a contributing factor. I choose not to keep my heretical thoughts to myself, so the snobs with perfect water quality will just have to deal with it. To anyone else who sees a need to repot their Paphs regularly, don't be intimidated by those who say it is only because you are doing something wrong. Take care of your plants as you see fit.