Thinking about getting some for my 55g, I know most on here don't like it but I had it once before as a hitchhiker and it didn't bother me and had no problem getting rid of it.
Problem is when I had it before I didn't have mollies and now I have 6 of them. Will they eat it faster than it can grow? I know duckweed is a fast grower but I'm only running one T8 48' tube over my 55 so it probably won't grow as fast as normal. I don't want to waste my money if the mollies will chow down and eliminate the duckweed. I planned on getting it from aquarium plants.com, it's sold in 2lbs. Don't know how much surface that would cover in a 55