I know this question was asked a looong time ago, but I really wish there was an answer to it, somewhere.
I think the plant sold as Nymphaea daubenyana in aquarium circles with the red leaves and short growing habit might have been the regular dwarf pond lily sold in the US, called Dauben's lily. It was the first water lily hybrid produced from nymphaea caerulea (Egyptian blue water lily) and nymphaea micrantha. However, it is possible that there is yet another hybrid of some sort, that remains small like this hybrid, tolerates low light without losing its read leaf coloration, and is now hard to find! If anyone knows where it can be sourced, can they please speak up?