Originally Posted by RJT
I consider you the resident tang guru. Can a 4in powder brown and 2in chevron live in a 150g 6 feet long?
Lol. Don't know how I got that title!
The powder brown would be fine in a 150 gal
with a chevron tang. Just be careful that you don't add many more larger fish. The only issue you may run into would be turn around space for the chevron. The main reason he is listed for a 180 gallon is due to not just the 6 ft length, but also for the extra turnaround space. You may get away with it of you make sure there is space to turn around behind your rocks. In other words, make sure your rocks don't sit on the back glass of your tank- make an island of your rocks in the center of your tank.
These two tangs are from different families and have different shapes and colors so you should be fine inquiry compatability. I would still add them at the same time though.
Also, i have been told by many different people in the hobby that the powder brown is more prone to ick than other tangs (also the powder blue and white cheek). A better recommendation than the chevron would be a kole tang or the bristle tooth.