I use the same egg trap Aquagirl does on one half of a 10g tank with a divider down the middle. The only non-floating plants in the tank sit directly on the egg trap. This way my CPDs (and hopefully my tinwinis too) pretty much only spawn over the trap. My egg yields have been pretty good. I hatch them on the other side of the divider then I move all the free-swimmers to a grow-out tank with more infusoria. I moved 12 over just today…