In response to Graeme`s thread on the white balance setting on a Canon 350D, here are the white balance settings on a Nikon D40. Shutter speed 1/2 sec. Aperture F 16 with one stop of underexposure. ISO 200. Tank lighting is 22W of Arcadia Arc Pod compact T5s. Each white balance setting can be adjusted by +/- 3 in increments of 1. Adjusting negative makes the image more yellowy and red, adjusting up makes it more blue. I haven`t done any adjusting, as there would otherwise be 24 pictures to post. The last image is pre set white balance which is used when the desired results can`t be achieved using the other settings. Use a white or neutral grey object under the subject lighting for the camera to use for measuring white balance. Once again, I haven`t made any adjustments with this setting. Excuse all the furniture in the tank and lack of background, but the tank isn`t really ready yet, to attempt to photograph properly. Auto White Balance: Incandescent: Fluorescent: Direct Sunlight: Flash (with the flash selected off): Cloudy: Shade: Pre Set: Cheers, Dave.