yes i think dwarfs and tangs r compatiple but 42 is much too small for a purple tang sorry. sum people may disagree, but it will definitly outgrow the tank.
DAVE
Discusking, in a larger tank this would work. A lot of people think that a 42 gallon aquarium is too small for a purple tang, and I might have to agree. Even though I have a yellow tang in a 50, 42 just is too small.
