Join Date: May 2020
Location: Southeastern US
I like Salvinia nutans. The roots are not super long - they hang maybe 2" into the water column, but they are substantial enough to make a zone at the surface and provide fry cover. It grows fast so I'm always throwing a bunch away so it doesn't make an impenetrable mat, but I could clear it out entirely in a minute or two. The smallest plantlets it tends to break into are still about quarter sized and easy to see and remove.