Yes, that’s better.
To point out the obvious: a phone camera isn’t the ideal camera for such. Apart from quality issues, I suspect you need to be very close to the glass, which gives you reflection image over a large area behind the camera.
I would set this up in a room rather than outside if you have suitable lighting equipment for it. That way you can have a dark room with the lights only on the backdrop and the liquid. Black curtains or board on the reflection side is definitely a plus. perhaps place the camera slightly obliquely so that it doesn’t reflect on the glass. But not so far off axis that it creates a double image through the glass. A camera with a decent zoom would help with this. Also, if the background is REALLY white, it helps alleviate any remaining reflections.
Black background would be a good option as well. Then you would only have to light the tank.
PS. It is a very nice effect indeed. As it happens, I am reading James Gleick’s “Chaos” currently, where he’s talking about turbulences in water and air. Now you got me wanting to try this out…
Kalleheikki Kannisto
Senior Graphic Designer