Aqueon QuietFlow LED PRO Aquarium Power Filter 50 (Up to 50 gal)

Featured is a LED filter cartridge change indicator light that flashes when the cartridge becomes clogged with debris, providing a reminder that it's time to replace the cartridge. A great benefit of the Aqueon QuietFlow filters is the internal pump design that helps dampen noise, eliminates leaks and is self-priming, meaning it 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 filtration mechanical, chemical, biological and an additional specialty pad? for the cleanest, clearest, healthiest water. Stage 1 ? Dense floss removes particles and debris. Stage 2 ? Activated carbon removes toxins, odors and discoloration. Stage 3 ? Patented Bio-Holster provides surface area for beneficial bacteria that remove toxic ammonia and nitrites. Stage 4 ? Bio-Media grid supports additional beneficial bacteria establishment while adding more oxygen. It also reduces splashing making the return exceptionally quiet. Stage 5 ? Specialty filter pad option for additional carbon, ammonia reducer or phosphate remover. All filters use Aqueon Replacement Filter Cartridges and Aqueon Specialty Filter Pads. Use cartridge Aqueon large.