spinning

Hello everyone, please only respond if you have experience on the matter, thank you for your time tank set up size: 180 gallons fish: 1 Adult Oscar fish, 7 silver dollars, 1 Adult pleco, 1 Adult bichir water parameters: PH 7.1, Ammonia 0ppm, NO2 0ppm, NO3 0ppm filtration system: UV filtration...