Question
I have a lot of sundews growing and multiplying nicely in a large flat pot.  I usually water it with spring water but I wasn't paying attention and I MIGHT have watered it with tap water because the bottles very similar.  I slanted the pot and poured spring water at the higher end of the pot to let it drain out. If it was tap water and even though I drained it, how much would this affect my sundews?  Should I repot?

Answer
Hello Matt,

One watering of tap water will not unduly harm your plants if you continue watering them with distilled, fresh rain, or reverse osmosis water. Be careful of the spring water you use. Some natural spring water contains minerals of the sort dangerous to carnivorous plants. The main thing to avoid would be mineral salts like calcium, magnesium, and sodium. If the spring water contains those minerals, stop using it and switch to something purer.

From the sound of it your sundews have been doing fine, keep up the good work,

Christopher