There we go! :3 I hope you guys like this little prop and will use it in your own works. Or at least have a chance to check how it was made more "hands on" than just me explaining the process and maybe it will give you some cool ideas for the future :)
Installation:
As always, just drop the contents of the My Library folder into your DAZ library. The prop will show up in: Props/JustRadiation/GlassTub
This prop was made to be used in DAZ Studio on Iray render engine. It's split into objects so it can be easily edited. Additionally I added example cloners for bubbles which are disabled by default. But if your machine can handle it - go ahead and re-enable them, they definitely give more definition to the whole.
While I was re-assigning materials I changed some little things - especially when comes to how different materials reflect surroundings and gave glass more natural heavier IOR - when comes to stuff like this in reality glass which is used is on heavier side than simple drinking glass. Also I added those deck boards as a bonus - although I am not super happy with them, you can always just disable or delete them, it shouldn't be much of a problem.
Some little previews of how it looks in render:
Prop file: