Oh I don't know, it survived my goldfish just because it grows so fast, and grows after being ripped apart. But as I said, it's the water it will be able to survive .hygrophillia polysperma will get ripped to shreds! not a tough plant at all.
vallis & anubias is you only option, as they are tough do well in the hard water as they can get Carbon from the bicarbonates.