by Jshakour » Tue Feb 21, 2012 8:31 pm
The only rule I really follow is 1m two or more females. Make sure you have plenty of hiding spots for the females. I also will float a "bushy" plastic plant on the surface for the females to hide in.
If after a while of no breeding, you can try to add some dither fish to the tank. That might trigger a spawn.
I hope this helps!
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-James