red tail tin foil barbs

Hello All,  I just recently inherited a 55 gallon tank that was being occupied by a 8 inch Red Tail Tin Foil Barb and two 6 inch Pictus Catfish. The tank itself came with an External Hanging Agua-Tech 30/60 Power Filter and a External Hanging Aqueion Power Filter 10. I do recognize that Barbs...