use distilled water. if you are using any kind of municipal water you almost certainly have fluoride and many other interesting/terrifying things in the water.

I use spring but distilled works 2 :)

Bottled drinking water could be tap water. Distilled is much less expensive (and no fear of anything unknown in it) if there's no rain. Spring water has come from the ground somewhere, and may or may not have minerals that plants may or may not like. Condensate from an A/C or dehumidifier is free of impurities.

I bought 2 lucky bamboo plants from Walmart after liking them so much at a Chinese restaurant...so far I'm using distilled water, I hope it's the right thing to do...

This is great - I found a use for the water in my dehumidifier. I will change the water first thing tonight when I get home.

DhD