I’ve been in a sensory deprivation tank. To your question, the first thing you realize is that there’s no chance of drowning so it’s easier to let go. It’s not like you’re into a pool or out in the sea where it’s harder to relax because you’re exposed to externalities or you’re afraid that you might drown. You can’t drown in a tank because there’s like 20 cm of water in there. Once you let go you don’t feel anything. Everything is pitch black, you can’t hear sounds, and of course you don’t feel the water because there’s no movement on the water. You’re inside a controlled environment. It’s also easy to panic and a lot of people do which makes the whole experience extremely uncomfortable, especially if the water gets in your eyes because it’s highly salinated and hurts like a motherf*cker.

Aside from that it’s like meditation once you get the grip of it. But it’s easier than meditation because it doesn’t require a lot of exercise to make it work.