Tubing, as in being towed on a tube by a boat? Definitely not safe. You're constantly being jerked, even when going slow. Accident waiting to happen. I definitely wouldn't. It does sound extremely fun, unfortunately.
Depends the kind of tubeing your talking about. Floating lazily around on a tube is fine. I'm pregnant and take my son swimming in pools and lakes all the time. If your talking about being pulled behind a boat I would say no. Just check ahead of time to see if where your going has any warnings on things like dangerous algae or bacteria in the area.
Yeah, I have been tubing and theres a lot of sudden movements and bumps that come with the ride, I wouldnt risk it. If you were just floating on the tube then thats probably fine, but no fast pulling or anything like that.
I'm not sure about this one. Isn't the water really dirty? It is where I live at least in Arizona. I probably wouldn't do it.
Tubing and swimming are two different things. Def not something you should risk. Tubing can be extremely dangerous to yourself and your baby.