Anacharis: low-med lighting, grows very fast, place in background, does not root, can be tethered or float, takes over quickly, API leaf zone is ok for it. There are a few things that can kill it: salt, Seachem Excel, and high water temperature. Absorbs so much ammonia, it may starve the other plants. Goldfish like to eat this, but it grows so fast, it might be ok in your tank.
