I make my RO water outside, and I didn't let it heat up one night before watering my plants. I had no idea it was as cold as it was, but the next night I was in the car at about the same time and the thermometer in the car said 48-50. I water plants that were in a terrarium at about 80 degrees with this water, and here's what happened.
Clip. clone 1 AKA N. clipeata X (N. clipeata x N. eymae) (Happy, Ron? hehe)
It was a very hard lesson learned. Don't just assume your water isn't too cold. Let it warm up inside a little before you water. If I'm lucky, the Ceph's roots weren't damaged too badly. Lucky for me, no pitchers on the clip hybrid were harmed, and although the pitchers on the Cephalotus and 'Jungle Bells' were harmed, they are still useful to the plant. Hard lesson learned, but it could have been worse. Some of my Sphagnum has bleached, too.