Muske;2918429; said:With a mild powerhead, the O will have plenty of calm spots in a 90.
Will Hayward;2921394; said:Try a Koralia 3 or 4, placed 2/3 down blowing across the back wall of the tank.
I also use the spray jet of my xp4 instead of a power head in my cl' tank.ewurm;2921161; said:I use a lot of powerfilters, which has the same effect.