I suppose you were wondering if the chlorine content of tap water would burn their skin? Probably not unless you live someplace where the water is so contaminated that the municipality has to flood the water with chlorine to make it "safe". I suspect you'd be having skin problems if that's the case. If you know your water has chlorine in it (call and find out) you can get rid of it pretty easily by setting the water in an open bucket for a day or so before using it. However, if your water utility uses chloramines to treat the water you'll need to remove it with a herp safe water treatment.