I'm not sure if you are looking for food plants or decorative plants. Our aquatic turtles have eaten every plant we've put in the pond or indoor aquarium except Taros (elephant ears) and a few other very large plants that probably wouldn't work for an indoor aquarium. I think every turtle aquarium or pond should have some Anarchis in it for the turtles to eat and I'd be happy to send you some if you'd like. If Water Hyancith or Water Lettuce is legal in your state those are a good choice for floating plants - the turtle will nibble on them, but they should grow faster than one turtle can eat. Unfortuantly, I can't have those two plants here in Texas. I do have a variety of small duckweed (floating plant) that is legal here which I could send you if you are interested.