Hello,
Yes, novalsan baths are fine & are safe. Just do not let him drink it really. It is used as an antiseptic & can be used in the oral cavity, but it is best that they do not drink it though.
Why is it you are wanting to give a novalsan bath?
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!