I wonder if someone have already tried any tripod fluid video head underwater, form smooth pan/tilt camera movements? If so, what brand and model have provided the best results/durability?
My main concern is about how long will a fluid video head survive in the salt water conditions, maintaining it's fluid movements. I'm considering, for now, a Manfrotto MH055M8-Q5 ( just for the ability to shoot both photo and video in the same dive) or a dedicated fluid head like the 503 SERIES.
But of course I would like to hear any other suggestion that you might have...