Are there any edible plants you can grow underwater in an aquarium? Got an axolotl tank and currently the plants growing in it just go in the compost bin when I cut them back periodically.

They do a good job of filtering the water though, nitrate levels are lower than the tap water I filled the tank with. Just would be nice to grow something more useful as I am already running the lights. Extra lights for another tub is more power use and I don’t know if it would be worth the energy cost.