Koi Attacked Update

The new Koi I wanted to introduce to the pond are 8-10 cms. When I put them in, the rest of the fish attacked them to the point of the new fish are having their fins and tails damaged. They were forced to the surface and were not allowed to submerge. -skinflint622 Sounds like your Koi in your pond were trying to breed with the new Koi that you introduced. There's nothing much you can do except putting the new Koi in a different pond or making a barricade in your existing pond to separate your new Koi from the existing ones. Share: Del.icio.us Digg Reddit