At my lfs, we run 1-FX5 on a 210 with 6-10 large cichlids. Of course the tank gets a 75% change weekly and the filter gets cleaned every couple of weeks.
I personally run 2-fx5s on a 125. The tank is not overcrowded but the additional filtration and water movement shows in terms of growth and overall health of the fish.
I personally run 2-fx5s on a 125. The tank is not overcrowded but the additional filtration and water movement shows in terms of growth and overall health of the fish.