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. I do have snails.
