I'm not looking for fast just large/long/tall growth. It's mainly about removing eyesight from each other when they might start getting aggressive with each other. The other issue is that I haven't found my hardscape spots yet that give me a perfect natural feel to it. Which is why I'm not too fond to use Val. the runners would kind of prevent me from being able to hardscape around them without it looking like I did so. It's kind of a catch-22. If I put the hardscape down, they'll naturally grow around it, which will make the plants look naturally placed but not the hard scape, and vice versa if I were to place the hardscape around the val. I feel like a plant that I can snip and place to propagate new plants will let me have full control over the natural feel of the tank.sorry to contradict but swords would not show immense growth without ferts but it can very well survive without them.