Looking promising. Is that glosso on the bottom of the second image?
Some tips for taking whole tank photos, assuming that you did the switch to digital already...
- Don't use a flash
- Wait until it is dark, and turn off all ambient light to avoid reflections in the glass
- If you have a tripod, use it. If not, look for something sturdy to rest your camera upon. Maybe a chair or two, a little desk, a ladder, whatever. Do not try to handhold the camera, thinking that your hands aren't that shaky.
- Take your time focussing. Some fully automatic AF cameras need about half a second to focus. If you press the shutter too fast, the optic is still searching. Better cameras tell you when the object is in focus.
- If you have a "long" tank, and are familiar with image editing, you could take two pictures, one of each half, and combine them afterwards. Displaying a "left side" and a "right side" separately is an option, but often doesn't do justice to the entire tank. Also, don't cut part of the tank, unless it is empty surface area.
- Take several shots, adjusting the exposure, and then pick the best one.
- Take the photo centered in front of the tank (unless you take two shots like described above). Then, in an image editor, cut off the dark parts (canopy, stand) which usually don't add much to the image. That way it is smaller, loads faster, and the focus is more on the contents of the tank, rather then the surroundings.