Ok, I was at the pet store with my dad and they have a display SW tank. In this tank they had a pacific blue tang and a purple tang. The purple tang didn't look like other purple tangs. It had a deep violet color. I wish I had a camera with me. Well, my dad loved the tang and was asking the store owner all about it. Turns out it cost $300! I was just kidding but I said, "You know, if we got a 100 gallon instead of a 20 we could get a tang." Then my dad started looking at tanks at said "could we get one in a 75 gallon?" Wow was I excited. The only problem is that I really don't like buying wild caught fish. So I searched and searched and found this: http://www.inlandaquatics.com. They have captive reared pacific blue tangs and powder blue tangs. Would either do ok in a 75? I really hope so, I can't believe I may be able to get a 75!