Clown Tang rescue

[yosemite sam]

Sorry to double-post. I put this on the fish board too....
Anyone know anything about clown tangs? There is one at an LFS here that I normally don't buy fish from (I get my snake's food there). It is really gorgeous but it has a few ich spots. In this store it is a death sentence as they don't medicate their tanks or have a QT tank. I actually rescued my other tang from the same store. Anyway, my tank specs are below. I have one tang, a juv Vlamingii and and thinking about getting a yellow tang in the future. I'd love to resuce the poor guy but don't want to regret it down the road if it thrashes my tank. I have read that they can be aggressive and I obviously want something reef safe. Any help would be appreciated. Thanks

 

[barryi]

all i know is that they are very hard to keep, need lots of swimming room and go at wars with other tangs, such as the one you have. They have venomous spines or something like that and will charge at the other tangs with it. If im wrong pease correct me.