Thanks for all the great info. I guess I misunderstood Pond Frogs original comment about diploidy. I thought that he was saying the diploids were the sterile ones.
Anyways he says that the fish feed heavily on airborne insects and he does not pellet feed because it is remote. Sadly enough, I have never been to the lake so I don't have photos. I have encouraged him to join the forum. Now I'll let him know that we're talking about his lake and that maybe that will get him to join.
Would there be a downside to simply keeping it a Rainbow only lake? I'm usually a proponent of biodiversity but it seems like in this case it may be best to just leave it alone and let nature take its course. Ahhh...the definition of sustainability.
