There was a version with the RGB strip between the base (POM) and the tube.
Personally, didn't like the way the strip behave, as light from one side clashed with the other side depending on effect used.
Let's say the "start" of the strip was blue, while the middle was some other colour, not necessarily a blue-based one, and the end another colour. All three colours would merge inside the reservoir. Even worst if the coolant is some colour, other than clear.
But may be doable just replacing the POM part.