How is the best way to get a pair?
Buying a proven pair is the best way. Even though is does not guarantee they will spawn for you. Make sure you get a young pair that has proven to produce healthy fry. The second slower solution is to purchase 6 to 8 juvenile fish and let them pair off themselves. I put 8 to 10 fish in a 55-gallon tank, which allows them plenty of room to grow.