Do a group of hongis w/ 1m6-7f and the same number of a blue fish like ps. Socolofi or M. Callianos. The female hongis have decent color and both socolofi and callianos have male and females that look the same.
Another option would be a species tank of ps. Saulosi, 3-4m/10-12f. They stay smaller and the males are blue with bars and the females are yellow.
Another option would be a species tank of ps. Saulosi, 3-4m/10-12f. They stay smaller and the males are blue with bars and the females are yellow.