| This is an interesting one to me too. I have a small group of 7-8 paphs and I treat them all the same. Only one of them has done what you are showing - why just this one? It would appear to be somewhat genetic? Evidently some plants are more sensitive to issues than others. I've been directed as you have already been - water quality or excess fertilizer/mineral buildup. I'd flush it really good with good quality water every few months and be careful how much fertilizer you give it. You might even consider only foliar feeding it - just a thought. The plant will need some of the minerals from typical water to grow, so if you are using distilled water you might consider instead using at least part spring water or some other water that will have them. mike |