Thanks Noel. I think I'm with you now; taking predator reproduction out of the picture so you have much more control over the whole system. That's basically what you're doing in your pond with HSB as the main predator, right?
I agree that accurately sexing every single predator is tough, and I wouldn't trust myself to do that correctly, so I think if we decide to go the route of a non-reproducing predator, I'd rather go with HSB, or something that's just unlikely to reproduce in my pond like WE.
