underwater color correction

Good afternoon everybody I'm new to this site and a novice PSP X user. Can anybody offer any advice on color correcting my underwater shots.

The only posts I ever see on any site usually deal with Photoshop. I've been getting decent results using one step photo finish and then sliding the overall brightness bar to a negative position usually -10 to -30. I then go to fade correction and use a value of 46. This seems to do a decent job. Any help would be greatly appreciated. My wife and I are avid snorkelers so I'm usually taking my pictures at a depth of 10' - 30' of water with an internal flash.

 Thanks in advance

Joe B