I would reccomend a plant with longer roots, like amazon frog bit or water lettuce. I have watersprite, and though it grows fast and my fish love it, it propagates from adult leaves, so the babies tear the leaves off the adult plant and the leaves rot. It's kind of unsightly. I also have regular frogbit, the smaller kind, and it is very annoying..it gets everywhere, and it's hard to do matnience without being covered!
Really any floating anything. If you have plastic plants, you could just float them to see if it helps them, before you buy.
I have these neat grid like plastic plants that are supposed to be for ground cover, but I used to let them float, to help the fish feel more comfortable.
Also as for the growth of your plants, I'm not exactly sure, I've never kept those plants, though to keep my floaters away from areas where I need more light, or to stop them from getting tossed around in the filter flow, I use plant corrals. I've heard of people using air tubing, though I used some random plastic sheet sled, and taped strips of it in different sized circles, and suction cupped them in place. Works like a charm.
Last edited by LyzzaRyzz; 11-12-2012 at 08:42 PM.
Reason: Plant corrals!