Its adequate - it maybe doesnt quite reach the corners - but no problems with mine.
I've got HC growing in mine without even trying![/quo
Thanks Eboeagles il be getting the impeller from the aqua clear 50 to increase flow just to be on the safe side as it fits straight in without any mods just to be on the safe side as iv been seeing mixed about the standard hob,
can a powerhaed be added or is that to much for the edge.