I know that this kinds of questions have been asked a million times here, but I was having trouble finding answers by searching. My silver dat has been stable since I bought him a couple of months ago, and he switched from feeder guppies to krill (frozen and freeze-dried) but shortly before I introduced some new fish, he seemed to start to lose appetite, and began to get "splotchy." Now he's ALL splotchy, and hardly eats. He used to beg frantically for me to feed him, but now. . . I know silvers prefer brackish, but plenty of people seem to have kept them in "fresher" waters. I don't go all the way brackish, but my water is a bit salty for fresh. I thought maybe he wants something else to eat besides krill, but of course he's a picky eater. Any thoughts?