This is something Iv'e been working on. My working title is "It's Always Spring Somewhere". I want the water to still be blue but the plants and fish to show up with more natural colors (green plants, goldfish). Tried all the presets and played around several times with the settings. What you see here is the bumpy blue glass preset switched to parametric scaled at 1XYZ shifted to aqua with 10 reflectivity added. Suggestions and comments welcome.