Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Duckweed does not like strong surface ripple/agitation.IME
Takes a while (week or two),but between the surface ripple, and netting it out,I keep it under control fairly easily.
I like a little bit for many of the young fishes nibble at it.
Just don't like it covering 3/4 of the surface like it WILL if I don't keep after it.