Hello, I'm new to the forum, and to photography in general. I was given a D3000 for Christmas, and I have been really enjoying getting into the hobby. I am still learning the ropes - but I have some questions regarding my photos. I take many pictures of my aquarium, and I believe that I am over-exposing my shots. How do I fix this? As you can see, the sandbed looks over-exposed. Am I mistaking, and how do I fix this? Here are a few shots that I am rather proud of: thanks for the help! and thanks for looking!