As long as you can continuously get the CO2 out of the way above the surface so you don’t suffocate… you might still die.

“Non-buoyant water” is a real thing. When water contains enough dissolved or finely dispersed gases, it becomes less dense than the human body. There will be no buoyancy force making you float, so if you stop moving you won’t just hang near the surface, you will sink to the bottom like a rock.

Now, maybe you can still generate enough force to tread water if you really tried. Maybe the bubbles themselves getting caught under you would counteract the loss of buoyant force, but the point is that if you carbonated a pool enough, it could possibly be more of a deathtrap than a play area

That's like bubbles right? It would lower your buoyancy and cause you to sink and drown. Fun fact some think this is what the Bermuda triangle was all about, gas bubbles in the ocean and sailors didn't know or couldn't react so the ships sank.

I’m pretty sure you would die because the CO2 doesn’t stay dissolved. It would be highly concentrated near the surface and would displace the O2 so when you tried to take a breath near the surface you’d not get enough O2 and would eventually asphyxiate. Just a guess though.

Reminds me of the guy who made a swimming pool of jello. There's a video about it

I've been in a carbonated bath before, although I think it was a light carbonation. Mostly the same, but if sat still for a while, your body turns white from the thin layer of little bubbles stuck to your skin. Pretty fun wiping it off and seeing a cloud of bubbles float up.

I feel like it would be both awesome and terrible because I think it might tickle.

What about a pool of Guinness that is nitrogenated?

I swim in creeks and rivers and the bubbly water is very difficult to swim in. Feels a bit like trying to swim in the air. I think carbonation would be similar.

I'm thinking it could be a lot of fun in a heated whirlpool with adequate ventilation. Bonus pts for tippling some champagne with one's sexy other. :D

In a jacuzzi sized pool where drowning and suffocating aren't concerns I imagine the tingling would be quite pleasant.