Rez temps to low

What happens if you accidentally chill the rez temps down into the 50's?

Your roots will freeze up and your plant dies? Deffinatley sounds like trouble*

You can always add a tank heater if your reservoir temps remain low...

What happened was that I added the water bottles to fast and dropped the temp to 58 degrees. I looked at the temps again not long after I posted, they didn't stay that low for long. Everything seems to be fine now. I think I actually have some root damage from to high of ppm, but this was before the temp drop.