Registered: March 2003 Location: Belgium, Wi Posts: 1,332 users gallery
Well I am not a scuba diver so I am not familar with what the color should be. I do know that water absorbs red. Examination of the photo revealed that the red channel was black. So this is what I did.
1.) Image Adjustment Channel Mixer. Output Channel Red and 40% Green and 40% Blue
2.) Image Adjustments Auto Levels. This left a marked Magenta Cast.
3.) Image Adjustments AutoColor. Better Color but still Magenta
4.) Image Adjustments HSL. I changed the Hue -25.
The yellow band on the foreground Scuba Divers Tank served somewhat as a guide. I decided to quit at this point.