I gave up on plants had hornwort in my 85 goldfish tank that they still ate up . It took them longer but they still tore it up. Now I got a 17 inch living world plastic Amazon sword that they ignore. LOL
hornwort is ridiculous! Fact that it can grow 3 inches a day, the little leaves get everywhere, then if you are not vigilant on cleaning up after them, then your ammonia levels can spike too crazy levels.
I removed mine, and went with ludwigia and pond penny and have had great luck. I have a mystery plant and watersprite.
I put a rocks around the base and none have been ripped up