Photography Tips / Locations

Removing an underwater color cast

There are about a billion different ways to use Photoshop, so it can be a little overwhelming to try to find how to do certain specific things. I'm slowly learning all the nooks and crannies, and I'll try to share the most useful as we go along.
We were in Chicago a little while ago, and decided to hit the aquarium. When we arrived home and I got a chance to look at some of our pictures, I was disappointed at how green all the pictures looked. They had all taken on a strong green hue from the water. (They asked us not to use flash... I'm pretty sure this would have fixed the problems, but we always try to follow the rules.)
There are a whole bunch of different ways to get rid of this color cast, (Levels probably being the most reached for...), but there is a nice simple dialogue box designed for this exact circumstance.
Enter the color Balance box.

As always, we are going to use an adjustment layer, so we can undo any changes if we want to later.

We know that it's a green cast that we want to get ride of, so we want to add some of it's opposite color to counter act it. The color balance dialogue box is laid out to easily determine the opposite of the main three colors (Red, Green and Blue).

I left the Tone Balance on Mid tones and added Magenta until the image looked more natural.

While I may be mistaken, I image the background plant life is green, so I left the Shadows with a green tint.

The final photograph after some tweaking. Without the green, he kind of looks like he is flying through the air...Maybe I should add a little green back? It's mostly up to your own taste at this point.
Here are some more before and after shots.

(Please ignore the poor quality of the shots, Nikon cameras are not the best in low light situations, and I was running out of battery power at the time.)