i just typed a nice sized response and my laptop went back and i lost it all. i hate that.
anyways im not a tree hugger, or a "tang police" enforcer but i do feel they deserve a nice size tank. the best way i can compare this is, how would you like living in your closet with no way of escape? dont worry, someone slides a plate of food under the door everyday.
i suggest a 75 - 100 gallon minimum for a single tang, which honestly they should prob. have something even larger. in the wild, tangs graze the rockwork all day in search for food. this alone is evidence they do not stay in just "100 gallons" of water.
yes, it is true that fish get eaten in the ocean but that is how the world spins. this allows the gene pool to be at its best, something that doesnt get to happen with humans or captive bred species. every other animal ( that still gets whats little left of the wild ) has to be on their "A" game or theyre dead meat, literally. ill leave it there as to not take away from the original posters thread, if a mature debate on this topic needs to happen, im all for it in a seperate thread.
as for the sailfin, i wont yell but it could have, and still could be returned to the store.. even for store credit. at the very least it may be best to explain to your husband not to impulse buy. i would hate to see him bring home a lionfish next week and it eat your tank

what kind of sailfin is it anyways? they def. are a pretty fish.