I don't know about the best... but I had a Yellow tang and a Blue regal tang in the same tank with my two (nemo) clowns. They never bothered each other.
even a 55gal is too small those fish get up to 1ft long and need at least 6 foot long tanks to do best in, the only tang that does real well in small tanks like 55gal are yellow tangs
Originally posted by *BTA*
yes its still not recomended but it is one that can live in a 55gal
Well, sure any tang that can fit in and have some swimming room can live in a 55 gallon, but the question is do they actually like it in there? Eating and swimming IMHO does not mean the fish is happy.
I've got a Blue Hippo and a Yellow in my 90 gal with 2 Ocellaris Clowns and they appear very healthy and happy for over a year now.
I have a Purple and Sailfin in my 75 gal with a Gold Stripe Maroon and they all are doing great as well.
A 30 is a little small for a tang period. A 55 should be ok for the Blue by himself. I wouldnt put any other Tangs in there with him though.