no no no!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
IF A TANG OR ANY FISH FOR THAT MATTER HAS ICH, IT HAS IT, IF IT DOSEN'T HAVE IT, IT DOSEN'T..... A FISH WILL NOT GET ICH FROM BEING STRESSED UNLESS IT HAS ICH
the purple tang should be fine in a 24 if you know what you are doing! and...