I've had a nice 8"+ clown tang now almost 3 years, and a 6" powder blue about the same, emp angel and blue face angel longer, and the new regal angel.
http://www.youtube.com/watch?v=8nAxw_v-k9M
http://www.youtube.com/watch?v=8nAxw_v-k9M
Recty, I wonder if it will hit a 4" wall in the home tank....I haven't owned a smaller one for long enough to find out.
Nice fishies. And great aquascaping