The whole cull/anaethetise issue is something that anyone intending to breed fish needs to think about before they start. In my line of siamese fighter breeding, I can and have ended up, many times, with over 300 fry at 1-2cm (at this size they are going to survive), predominately males - therefore its something that I most certainly have to face. Not only is it when the spawns are too large but anything not good quality or pure breeds need to be removed or at the least not passed on to others for breeding. Too often I see ''rubbish'' out on offer.