Bruce why 3 males and 3 females? For others the BG do not pair up - the males has a nest and the females go from nest to nest depositing eggs. Seems like I read that there should be more females (1.5 to 2 females per male).
Funny answer (on my part) to a good question (by ewest).....
The reason is that I just happen to have 3 males and 3 females that stand way out above the other fish in size.
After their initial spawn I'll attempt to move them to another pond with a more traditional mixture of males and females. This will just be a good chance to see if it makes a difference to just go with the top .1%
