Feather duster sizes
I want to get a feather duster for the 20 tall, but am trying to figure out whether a "normal" or dwarf is the way to go.
I've seen places that say that the crowns on the dwarf dusters only get to 1 inch wide, while other sources say 4 inches; and those on the full sized I've seen range from 4-7 inches. (I'm wondering if the sources that are on the larger side of the scale are talking about the tube length vs the crown diameter.)
Does anyone have more concrete numbers, ideally from personal experience? I don't want the thing to crowd out the tank.