Actually I have done just that in some of my tanks and it hasn't looked bad or stringy at all.ellisz said:Aesthetically, I can't imagine it looking good. Chaeto will get stringy and you will have a hard time making it look nice IMO. Nothing says you can't though. You could always do a hang on fuge. Nothing says you have to have a fuge but they are a nice filtration addition.
How big is your sump?