QuietFlow LED PRO Aquarium Power Filters Size 10A great benefit of the Aqueon QuietFlow filters is the internal pump design that helps dampen noise, eliminates leaks and because it is self priming, starts up automatically after cleaning or power interruptions. Higher flow rates also ensure a higher dissolved oxygen content for healthier, more active fish. There are five total stages of filtrationmechanical, chemical, biological and an additional specialty padfor the cleanest, clearest, healthiest