I think both my PEOY Paphs. has bacterial brown spot. The symptoms are: Rust color under the leaves, sunken tissue sopts on the tops of the leaves, and the leaves die at the tips. I only use distilled water so I dont think the tips are dying because of salts in the water. What can I do to help my plants? Will Physan 20 work?? Also what are the ideal conditions for PEOY??