That's pretty cool to do it for research. Probably a stress related thing.
I actually have used them a lot, just made this to see other people's opinions of them.
The dripping can easily be resolved. I am building a tank at the moment (improving on my last unfinished build, really) and making a slanted roof so the condensation on the roof rolls down to the wall and doesn't splash down.
It's crazy how aware you are though, with feeling such a small amount of water movement. I even feel my heart/pulse moving the water when I'm really, really relaxed.
If anyone else is interested in cost, it's usually anywhere from $30 - 60 an hour. $30 - 40 is a good price IMO. Owning is a whole other deal. DIY builds can be done for under $2000. Commercial tanks sell for $8000 - 100,000