How many Yellow Tangs can I keep in a 110?

We are setting up a tank at work and the boss loves yellow tangs and also wants an eel. I've heard that if you want more than one yellow tang, you need to have more than 2. Would 5 be enough for a "school" of tangs? Would 5 be good in a 110? It's 6 ft long, so they should have plenty of swimming room.

Also, what type of eel would work? Thanks!
 
I was told to always have odd numbers of tangs of a similar body shape. I have three yellows in my 135 gal, and I think that's about right.

FWIW, James.
 
I have had 4 (One much larger than the other three) in a 150 with no problem. I currently have 2 (both even numbers)
 
if you're looking to get a school of tangs a 110 isn't going to be enough. Tangs swim miles a day foraging for food. If you want that look you're going to need a really long tank or just a big one in general. Personally I think 5 tangs in a 110 is too many.
 
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