Is 1 fx5 enough to filter a 125 gallon tank by itself? Tank has 1 oscar, 3 silver dollars, 3 convicts and 3 pictus catfish. It currently has 3 xp3's filtering it but i would like to move those to my other tanks.I could keep 1 of the xp3 on there with the fx5 if need be but would rather use it on another tank.