I placed what I thought were 10 all male RES into my pond. One was not... 90% is pretty good accuracy, but not good enough. Fortunately, I wasn't that upset about the mistake. So far I have stocked over 3 dozen all male BG into the pond and 16 all male GSF. The big question will be if the RES female will only spawn with the male RES or look for some love from the BG or GSF. There will also be male and female RBS in the pond as of this spring.
