Originally Posted by somewhatshocked
It's a bit of a misconception that floaters can't handle movement. They just can't handle aggressive water movement. As long as you corral them with some airline tubing or fishing line, they typically can adjust quite well. They won't do well if constantly disturbed without anything to hang on to, though.
I have a 20 gal with two sponge filters filled with frogbit.
Also have a 11.4 Gallon with two sponge filters over filled with red root floaters