I use a noise reducer. My subject usually comes out crystal clear, but the background always has a little noise. I can't stand that grainy look in the background, so I clean it up a little. Though in this thread I only used it on a couple of pics. The others just came out pretty decent looking on their own. Experimenting with camera angles has helped me out alot. Depending on position it basically enhances the subject and darkens the background which also helps smooth out the picture, since it's always there the noise appears. Also it seems at least with this camera, certain angles make the subject appear in different hues giving them a unnatural yellow orange tinge. Also I chose my fairly high contrast plant's to help with the fish individual contrast. I've experimented with alot of combos trying to get the fish to show there best colors. I'm still working on it though.