Just as a precaution, you may want to leave the water sit in an open container for 24 hours just to let any chlorine burn out.not likely. its getting used to the light you only need one till it gets a few sets of leaves. do you have a fan oscillating occasionally making the plant wiggle? this is important so it doesnt stretch up. The only reason to use distilled water is if you have hard water. Go over to your toilet and take the lid off the tank. Is there a large amount of scale build up or is it just a little tint? The less buildup the better your water is. Distilled water without nutes will leech the life out of your plant. So may other purified waters, the best route is the tap IMO