RES turtles can be voracious hunters and killers. It's hard to think of our cute little guys being that way, but in the wild that's what they do. Like most reptiles, once the eggs have been laid the adults have nothing to do with the raising of their offspring (with the exception of gators and possibly a few others). The males certainly have no involvement with the offspring once their mating duties have been fulfilled.
I watched a Nature video recently that showed a dozen or so full grown aquatic turtles (some looked like sliders too) grabbing hold of a wading bird and ripping it apart like a school of pirhannas in slow motion. Kind of disturbing, but that's what they do. It kind of gives me a whole new perspective when i see my big female trying to bite my finger through the glass.
I like your idea of the plastic housing for raising the babies in, especially the overflow drainage holes. That way they don't escape during heavy rain. Good thinking.
