Matt, I didn't even know I had a male and female I just both them and all my focus has has been on my other tanks. I never even noticed the spawn just saw free swimmers and wondering what the hell it was. Lol
Every time I've grown out grammodes, I've ended up with a pair...and the rest huddled in a corners / beaten. I remove the extras and the male end up killing the female... and then I have a big male grammodes taking up a tank.