This sample is about the size of a golf ball spread out. If you do not tie it down it will float. This is mostly duckweed free, there's 20 pieces hidden across a 20 gallon long so there's a small chance. I'm going to float these in a cup and bounce it around to make sure there's no duckweed but you gotta keep your eye out for this one if you're anti duckweed, one or two pieces may of slipped in. There is a light colony of scuds that live with this plant.
