Here’s an old article I found in Pregnancy & Birth Magazine:

For real water babies, a flotation tank session is a pregnancy must. The tank is filled with water only 10 inches deep, but the high concentration of salt means that your whole body is suspended, giving you a feeling of weightlessness and soothing stress, aches and pains – great for pregnancy backs and feet. While you’re floating your mind produces slow theta brainwaves, which make you thought patterns clearer and more creative, as well as endorphins – the hormones responsible for happiness.

OK. So the thought of being shut in a dark tank of water sounds a bit scary, but you cam open the door or switch the light on at any time: therapists say it’s rare to feel claustrophobic. And the best news is that floating is safe throughout the whole nine months of pregnancy. Just imagine an hour to yourself, resting in warm water with gentle music soothing your senses and nothing to think about but you and your baby. Just lie back and enjoy…

"It was amazing to feel weightless. I was aware of tension draining from my body and my mind went into a state of complete relaxation. As I floated, I felt a strong connection with my baby. It left me blissfully calm."

"It took me awhile to relax but once I got used to it I felt as if I was half asleep. It eased my backache and and made me feel very chilled out, even afterwards when I was back tackling rush hour." – Zaza Patterson, 34 Weeks