No. They can be really agressive, and would kill most fish kept in a every day reef. And they would eat inverts, so you'd have a hard time keeping the tank looking clean. Also, if it would go into your 29 gallon in your profile, thats wayy to small to keep a trigger.
I know that they would eat most inverts, but there is a Humu Humu at my LFS and it has not grown for over six months, he's only about 3 1/2 - 4 1/2 inches long. Does this mean that it is a dwarf and wont grow any more, or is it just a slow grower? If it is a dwarf, Will the smaller size keep it from eating the inverts and corals, and make it not so mean because it doesnt have a size advantage? I have a 29 gallon biocube.