If you've taken a photo more than a few meters underwater, you know everything turns blue-green. Water absorbs red light first, so by ~10m the reds and oranges are basically gone. Most fixes are manual sliders or one-size presets you end up fighting per photo. I'm an iOS dev with a photography background, and I built ScubAI to fix this with physics instead of filters. Instead of guessing, it works out what the light actually looked like at your depth - from your depth + how clear the water was...