I have written an article on the subject on wetpixel mostly was related to video and keldan filter
Review: Keldan Spectrum and Ambient Filters by Massimo Franzese ::
but I also take stills with the same set up example below
Looking at me by Interceptor121, on Flickr
Looking at your shots you can see that your strobes are excessively cold that is because bluewater is not actually blue. The filters you are designing are too dark and probably take 3 stops of light
Water color is aqua and depending on where you go has tinge of green. Typically you are looking at taking 1 1/2 to max 2 stops of light away that is still manageable. At the extremes when you are too shallow or you go past a certain depth the white balance does not really work so you need to take filters off from everywhere
I cover between 6 to 12 meters outside I do not use this technique
Review: Keldan Spectrum and Ambient Filters by Massimo Franzese ::
but I also take stills with the same set up example below
Looking at your shots you can see that your strobes are excessively cold that is because bluewater is not actually blue. The filters you are designing are too dark and probably take 3 stops of light
Water color is aqua and depending on where you go has tinge of green. Typically you are looking at taking 1 1/2 to max 2 stops of light away that is still manageable. At the extremes when you are too shallow or you go past a certain depth the white balance does not really work so you need to take filters off from everywhere
I cover between 6 to 12 meters outside I do not use this technique