lol. actually I only use the tungsten for artistic shots since they are unnatural. the regular tank photos are just taken at varying times> sometimes only one halide is on so the actinics create a blue hue. Otherwise I use Automatic White Balance> AWB or whichever light setting provides the most true colors> Some fish dont expose well due to their color so you may have to play around with the light settings until the photo comes out right. or you can process with PS afterwards for the same effect. My best advice is to experiment like crazy and things will come naturally in time.