I love behind the scenes photos! Very creative. I’ve never taken the time to set something up like this, but it would certainly be fun to do so one of these days.
If there was some way you could make the background completely white (instead of textured gray) I think it would help me from thinking that the photo was underexposed. Does it look underexposed to you? I mean, like, the white-point hasn’t been set so it feels like there’s not enough contrast or something.
Thankfully, this can be done in Photoshop (or probably Lightroom) without much problem.
But the texture in the water is perfect, and I’m glad the liquid is color. Perhaps you could pop that a bit with Vibrance in Lightroom too.