Yes, I had to get RO filters because I read allowable salt levels in the book Understanding Orchids by William Cullina. He said orchids need water to have TDS (total dissolved solids) below 60ppm (parts per million). I had a water analysis done when we moved here 9 years ago, so when I read that, I checked the analysis and our water was much higher which is okay for human consumption but devastating for orchids. Thus the RO water. Rain water has an average 10-20 TDS. Spring water can have a higher TDS than tap water but distilled is fine.
BTW Steven, there are videos of Ursula and me watering at our homes in Pages.
http://cubits.org/orchids/page...
