I'm not sure if it might get caught in a fabric floating plant, but it should be fine in plastic. I have never used fake floating plants, even when I had fake plants in the rest of my tank.
Right now the whole top of my tank has pennywort growing on it, and the fish have no problem finding the food. I actually like it because, as slow as my rams eat, they get a chance to eat more food now because the tetras and rasboras are at all different areas of the top of the tank looking for the food. The food doesn't really get stuck, and what very small amount may is picked up by my ghost shrimp, who swim upside down on the surface looking for the food -- too cute! I love having the pennywort because it reminds me of lilies, but since it's a stem plant it's very easy to maintain. If it grows too much, you just clip off part of then stem and toss/share the unwanted part.
Sorry, I guess I'm still trying to convince you to go live, at least on the floating plants. They're really very, very easy plants to take care of and since they are at the surface you don't need too special of a light, any co2... idk of you'd NEED liquid fertilizer or not.. someone else can confirm or deny that. But I think it's the beautiful roots that dangle inside the tank that really made me love floating plants, as well as the fact that they can be a useful buffer if some of your params do spike a but. As far as the look of the roots, it's very delicate, something they'd probably never duplicate properly in any fake plant, and it's a great place for fish to explore.
Last edited by jennesque; 10-18-2011 at 09:40 AM..