Is fun, but really don't get water into your eyes!
I've tried this, and I suppose the float tank thing counts as floating in the sense that my body isn't touching anything solid. The sensory deprivation thing is a trippy experience, for sure, and worth trying once. I just don't get a good feeling of floating from it, though. Sure, parts of my body are submerged and are floating, but other parts are above the water and just laying there. I can't really move around in there without getting the water in my eyes, and then it just burns until I get all the way out and wash my face.
Thank you for posting here. It's interesting to see how other people get a feeling of floating. You should post where you got that photo from, though. Rules 1 and 2 still apply to posts like this.
By the way, the old subreddit's name was originally going to be simply "Floating", but a subreddit about float tanks beat me to it. I suppose there aren't any float tank communities on Lemmy/Mbin/PieFed, so "Floating" is available here, but by then we'd already been "Floating Is Fun" for a year and a half and I didn't want to change.