Personally, I don't think this is as good as your other works.
You did a nice job with the lighting and everything, and the water looks pretty nice but there's just one thing that bothers me. It doesn't take up the whole screen. Having the blue BG showing in a render makes it much less appealing to the eye. I know the room is at a funny angle to make it take up all the space, but you could have put in a filler, like a tile floor/walls outside of the room there.