I grew Water sprite for several years in my "Livebearer" tanks. The plant does grow in low light conditions if it's floated. However, it isn't long lived in those conditions. I've found Water wisteria and Pennywort to be more resilient and tolerant of different water conditions than Water sprite.
Water sprite is a beautiful plant, but Water wisteria is just as nice as is Pennywort, but these are better suited to low light, low tech conditions.
Just an opinion from a water keeper who has had some experience with Water sprite.
"Fear not my child, just change the tank water."