My understanding is that usually the chlorine just reacts with the anode (cathode? I can never remember), unless you use an anode that it can't react with (grap

My understanding is that usually the chlorine just reacts with the anode (cathode? I can never remember), unless you use an anode that it can't react with (graphite for instance). Even if it did make chlorine, as long as your power wasn't too high it might not hurt you (much) due to ventilation. It is also very reactive, so it tends to get used up reacting with whatever random crap is near it.