Thanks guys, I apreciate it. They seem to be alot lighter after they have been in the pond for awhile. What I am trying to say is ya know how the distinctive markings of black might be on a large mouth bass, they seem to be lighter markings after being in the pond for awhile, still very healthy but just lighter in color. My perch don't seem to do that. I use aqua shade in the pond once a year and I was just wondering if anyone has experienced or heard of this before?