Floating aquarium plants (Hollingdean)

Other than duck weed (no thanks!) I'd be grateful for any floating plants for my tank. I'm having a hell of a time trying to keep things going as my Amano shrimp (and to a lesser extent Red Cherries) are destroying anything I'm adding. I'm down to scraps and I need some more and healthier plants to start a production line in another tank. I've got in mind red root floater, salvinia or frogbit but if there's anything else going I'd love to grab some. Thanks.