Last summer I had my old but steady Gopro flooded in the Mediterranean. It had documented many good experiences – above and below the water line.
I have now retired the old kit and switched to a newcomer in the underwater video market. Paralenz has introduced a new concept of automatic white balance adjustment based on depth which should release you from bringing various filters with you or do significant post-edits.
I hope to be able to share a video or two once I get the new unit tested thoroughly.