yellow tang vs. blue tang

will these getalong in a 55 reef together ?? and one have sucsess

 

Which blue tang are you talking about? Powder blue or hippo?

 

opps sorry hippo

 

A 55 gallon reef tank is too small for two tangs in my opinion. Especially with a Hippo tang that reaches 12" as an adult. I suggest you read this, no self promotion intended, if you haven't already done so.

http://www.3reef.com/cgi-bin/yabb/YaBB.pl?board=Fish;action=display;num=1070655612

 

Whether or not you want to put both fish in a 55 gallon is up to you. Read the link that Craig posted and make your decision. All I can do for now is answer your first question

Tangs (and many other fish who are aggressive towards their own kind) will most likely fight if they share the same body shape. Since the yellow and hippo are not "conspecific", they will most likely get along as long as you add them at the same time. If you can't add them at the same time, you'll want one tang to be larger than the other. I would suggest that the hippo be the larger fish since the yellow tends to be aggressive.

 

I did a lot of research and the only tang i felt comfortable adding to my 65 Gallon was the Yellow Tang. A lot of tangs (Regal) get almost 12" long. I went with a Coral Beauty and a Yellow Tang and they get a long great.