I've always wanted a pair of banggai cardinals in my tank, recently I came across some captive bred ones and I want to get 2. The seller said they'll try to find me a male/female pair but there's no guarantee. I know some people said get 4-5 then rehome once there is one pair paired together, but I don't really want to get that many fish. Will a 4' tank be okay for two even if they end up to be same sex or they will actually keep fighting until one die? I don't really care about breeding but I love the look of two just floating there lol.